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Finding the Fourth Proportional to 124,757.69, 172,161.49 and 78,841.87

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Solution

The fourth proportional to 124,757.69, 172,161.49 and 78,841.87 is: 108,799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,757.69 : 172,161.49 = 78,841.87 : x
  2. Step 2: Convert to fraction form
    124,757.69/172,161.49 = 78,841.87/x
  3. Step 3: Cross multiply
    124,757.69x = 172,161.49 × 78,841.87
  4. Step 4: Simplify right side
    124,757.69x = 13,573,534,508.79
  5. Step 5: Solve for x
    x = 13,573,534,508.79/124,757.69
  6. Step 6: Final answer
    x = 108,799.18

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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.