Finding the Fourth Proportional to 128,086.52, 176,761.10 and 74,375.80
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Solution
The fourth proportional to 128,086.52, 176,761.10 and 74,375.80 is: 102,639.59
Step by Step Solution
- Step 1: Write the proportion equation
128,086.52 : 176,761.10 = 74,375.80 : x - Step 2: Convert to fraction form
128,086.52/176,761.10 = 74,375.80/x - Step 3: Cross multiply
128,086.52x = 176,761.10 × 74,375.80 - Step 4: Simplify right side
128,086.52x = 13,146,748,221.38 - Step 5: Solve for x
x = 13,146,748,221.38/128,086.52 - Step 6: Final answer
x = 102,639.59
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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.