Finding the Fourth Proportional to 128,082.97, 176,753.82 and 74,381.19
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Solution
The fourth proportional to 128,082.97, 176,753.82 and 74,381.19 is: 102,645.65
Step by Step Solution
- Step 1: Write the proportion equation
128,082.97 : 176,753.82 = 74,381.19 : x - Step 2: Convert to fraction form
128,082.97/176,753.82 = 74,381.19/x - Step 3: Cross multiply
128,082.97x = 176,753.82 × 74,381.19 - Step 4: Simplify right side
128,082.97x = 13,147,159,468.65 - Step 5: Solve for x
x = 13,147,159,468.65/128,082.97 - Step 6: Final answer
x = 102,645.65
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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.