To find the value of \( x \) when 20% of \( x \) is 72, we can set up the equation based on the given information:

\[ 0.20x = 72 \]

To solve for \( x \), we need to isolate \( x \). We can do this by dividing both sides of the equation by 0.20:

\[ x = \frac{72}{0.20} \]

Now, perform the division:

\[ x = 360 \]

So, \( x = 360 \).

### Summary:
The value of \( x \) is **360**.

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### Relative Questions:
1. If 30% of \( x \) is 72, what is the value of \( x \)?
2. What is 50% of \( x \) if \( x \) is 360?
3. If 25% of \( x \) equals 90, what is the value of \( x \)?
4. What is the value of \( x \) if 15% of \( x \) is 54?
5. If \( x \) is doubled, what is 20% of the new value of \( x \)?
6. How much is 10% of \( x \) if \( x \) is 360?
7. If 20% of \( x \) is 100, what is the value of \( x \)?
8. What is 5% of \( x \) if \( x \) is 360?

### Tip:
When solving percentage problems, converting the percentage to a decimal and setting up an equation can help you find the answer efficiently.

Learn how to solve the problem where 20% of x equals 72. Step-by-step solution provided, including setting up the equation and solving for x. Suitable for Grades 6-8.

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