Finding the Fourth Proportional to 87.58, 130.66 and 74.14
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Solution
The fourth proportional to 87.58, 130.66 and 74.14 is: 110.61
Step by Step Solution
- Step 1: Write the proportion equation
87.58 : 130.66 = 74.14 : x - Step 2: Convert to fraction form
87.58/130.66 = 74.14/x - Step 3: Cross multiply
87.58x = 130.66 × 74.14 - Step 4: Simplify right side
87.58x = 9,687.13 - Step 5: Solve for x
x = 9,687.13/87.58 - Step 6: Final answer
x = 110.61
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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.