Math Problem Statement

The Jones want to save $83,000.00 in 3 years for a down payment on a house. If they make monthly deposits in an account paying 6% compounded monthly, what is the size of the payments that are required to meet their goal?

Solution

To solve this, we use the Future Value of an Ordinary Annuity formula, which is suitable for calculating regular payments needed to reach a specific future goal with compounded interest:

FV=P(1+i)n1iFV = P \cdot \frac{(1 + i)^n - 1}{i}

Where:

  • FVFV is the future value (the goal) = 83,00083,000
  • PP is the monthly payment (what we are solving for)
  • ii is the monthly interest rate = annual rate ÷ 12 = 6%12=0.005\frac{6\%}{12} = 0.005
  • nn is the total number of payments = months = 3×12=363 \times 12 = 36

Rearranging the formula to solve for PP:

P=FVi(1+i)n1P = \frac{FV \cdot i}{(1 + i)^n - 1}

Substituting the values:

P=83,0000.005(1+0.005)361P = \frac{83,000 \cdot 0.005}{(1 + 0.005)^{36} - 1}

Let me compute this for you.The monthly payments required to save $83,000 in 3 years with a 6% annual interest rate compounded monthly are approximately $2,110.02.

Would you like further explanation on the formula, alternative scenarios, or additional assistance?

Related Questions:

  1. How would the required payment change if the interest rate were higher, say 8%?
  2. What is the total amount of money the Jones will contribute over 3 years?
  3. How much of the $83,000 goal is due to interest earned?
  4. What if they only save for 2 years—how would their monthly payment change?
  5. What is the balance after 2 years if they stick to these payments?

Tip:

Understanding how compounding frequency affects payments can help you make smarter financial decisions when saving or borrowing.

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Math Problem Analysis

Mathematical Concepts

Finance
Annuities
Compounded Interest
Time Value of Money

Formulas

Future Value of an Ordinary Annuity formula: FV = P * ((1 + i)^n - 1) / i
Rearranged formula for P: P = FV * i / ((1 + i)^n - 1)

Theorems

Future Value of an Ordinary Annuity

Suitable Grade Level

Grades 11-12 (High School, College-level finance)