Finding the Fourth Proportional to 86.91, 130.41 and 41.31
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Solution
The fourth proportional to 86.91, 130.41 and 41.31 is: 61.99
Step by Step Solution
- Step 1: Write the proportion equation
86.91 : 130.41 = 41.31 : x - Step 2: Convert to fraction form
86.91/130.41 = 41.31/x - Step 3: Cross multiply
86.91x = 130.41 × 41.31 - Step 4: Simplify right side
86.91x = 5,387.24 - Step 5: Solve for x
x = 5,387.24/86.91 - Step 6: Final answer
x = 61.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.