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Finding the Fourth Proportional to 78,691.92, 108,594.99 and 42,882.09

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Solution

The fourth proportional to 78,691.92, 108,594.99 and 42,882.09 is: 59,177.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.92 : 108,594.99 = 42,882.09 : x
  2. Step 2: Convert to fraction form
    78,691.92/108,594.99 = 42,882.09/x
  3. Step 3: Cross multiply
    78,691.92x = 108,594.99 × 42,882.09
  4. Step 4: Simplify right side
    78,691.92x = 4,656,780,134.73
  5. Step 5: Solve for x
    x = 4,656,780,134.73/78,691.92
  6. Step 6: Final answer
    x = 59,177.36

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1.5x scale

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.