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Finding the Fourth Proportional to 381,780.83, 572,672.92 and 129,062.66

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Solution

The fourth proportional to 381,780.83, 572,672.92 and 129,062.66 is: 193,594.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,780.83 : 572,672.92 = 129,062.66 : x
  2. Step 2: Convert to fraction form
    381,780.83/572,672.92 = 129,062.66/x
  3. Step 3: Cross multiply
    381,780.83x = 572,672.92 × 129,062.66
  4. Step 4: Simplify right side
    381,780.83x = 73,910,687,179.15
  5. Step 5: Solve for x
    x = 73,910,687,179.15/381,780.83
  6. Step 6: Final answer
    x = 193,594.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.