Finding the Fourth Proportional to 115.43, 159.17 and 106.31
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Solution
The fourth proportional to 115.43, 159.17 and 106.31 is: 146.60
Step by Step Solution
- Step 1: Write the proportion equation
115.43 : 159.17 = 106.31 : x - Step 2: Convert to fraction form
115.43/159.17 = 106.31/x - Step 3: Cross multiply
115.43x = 159.17 × 106.31 - Step 4: Simplify right side
115.43x = 16,921.23 - Step 5: Solve for x
x = 16,921.23/115.43 - Step 6: Final answer
x = 146.60
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.