Finding the Fourth Proportional to 87.99, 131.99 and 86.80
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Solution
The fourth proportional to 87.99, 131.99 and 86.80 is: 130.20
Step by Step Solution
- Step 1: Write the proportion equation
87.99 : 131.99 = 86.80 : x - Step 2: Convert to fraction form
87.99/131.99 = 86.80/x - Step 3: Cross multiply
87.99x = 131.99 × 86.80 - Step 4: Simplify right side
87.99x = 11,456.73 - Step 5: Solve for x
x = 11,456.73/87.99 - Step 6: Final answer
x = 130.20
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.