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Finding the Fourth Proportional to 138,989.52, 191,805.87 and 75,327.30

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Solution

The fourth proportional to 138,989.52, 191,805.87 and 75,327.30 is: 103,951.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,989.52 : 191,805.87 = 75,327.30 : x
  2. Step 2: Convert to fraction form
    138,989.52/191,805.87 = 75,327.30/x
  3. Step 3: Cross multiply
    138,989.52x = 191,805.87 × 75,327.30
  4. Step 4: Simplify right side
    138,989.52x = 14,448,218,311.25
  5. Step 5: Solve for x
    x = 14,448,218,311.25/138,989.52
  6. Step 6: Final answer
    x = 103,951.85

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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.