Finding the Fourth Proportional to 128,149.29, 176,833.94 and 74,432.93
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Solution
The fourth proportional to 128,149.29, 176,833.94 and 74,432.93 is: 102,710.42
Step by Step Solution
- Step 1: Write the proportion equation
128,149.29 : 176,833.94 = 74,432.93 : x - Step 2: Convert to fraction form
128,149.29/176,833.94 = 74,432.93/x - Step 3: Cross multiply
128,149.29x = 176,833.94 × 74,432.93 - Step 4: Simplify right side
128,149.29x = 13,162,267,021.31 - Step 5: Solve for x
x = 13,162,267,021.31/128,149.29 - Step 6: Final answer
x = 102,710.42
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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.