Finding the Fourth Proportional to 87.22, 130.17 and 84.99
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Solution
The fourth proportional to 87.22, 130.17 and 84.99 is: 126.84
Step by Step Solution
- Step 1: Write the proportion equation
87.22 : 130.17 = 84.99 : x - Step 2: Convert to fraction form
87.22/130.17 = 84.99/x - Step 3: Cross multiply
87.22x = 130.17 × 84.99 - Step 4: Simplify right side
87.22x = 11,063.15 - Step 5: Solve for x
x = 11,063.15/87.22 - Step 6: Final answer
x = 126.84
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.