Math Problem Statement

Rebecca inherited some land worth ₦50000 that has increased in value by an average of 5% per year for the last 5 years. If this rate of appreciation continues, about how much will the land be worth in another 5 years? using sequences and series

Solution

To solve this problem, we will apply the concept of geometric progression (GP), since the land’s value increases by a fixed percentage (5%) each year.

The formula for the nn-th term of a geometric sequence is:

An=A1×(1+r)n1A_n = A_1 \times (1 + r)^{n-1}

where:

  • AnA_n is the value of the land after nn years,
  • A1A_1 is the initial value of the land,
  • rr is the rate of appreciation (expressed as a decimal), and
  • nn is the number of years.

Step 1: Determine the known values

  • Initial value (A1A_1) = ₦50,000
  • Rate of appreciation (rr) = 5% = 0.05
  • Time period to forecast is 10 years (since 5 years have already passed, and we want the value after another 5 years).

Step 2: Calculate the value of the land after 10 years

We need to apply the formula for the value after 10 years:

A10=50,000×(1+0.05)10A_{10} = 50,000 \times (1 + 0.05)^{10} A10=50,000×(1.05)10A_{10} = 50,000 \times (1.05)^{10} A10=50,000×1.62889463A_{10} = 50,000 \times 1.62889463 A1081,444.73A_{10} \approx 81,444.73

Conclusion:

The value of the land in another 5 years (after 10 years in total) will be approximately ₦81,444.73.


Would you like to dive deeper into the derivation of this formula, or do you have any questions about this approach?


Related Questions:

  1. How do I calculate the future value of a sum of money using compound interest formulas?
  2. How does the number of years affect the growth of a value in a geometric progression?
  3. What would happen if the rate of appreciation were to change over time, rather than staying fixed at 5%?
  4. How can I calculate the present value of an investment given a future value and interest rate?
  5. What are some real-life applications of geometric progressions in finance?

Tip: In finance, geometric progressions are often used to model investment growth, like in stocks or real estate. Always check if the growth is compounded annually, as this simplifies using the formula directly.

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Math Problem Analysis

Mathematical Concepts

Geometric Progression
Exponential Growth
Sequences and Series

Formulas

A_n = A_1 * (1 + r)^(n-1)

Theorems

Geometric Progression Formula

Suitable Grade Level

Grades 10-12