Home / 80,517.38-120,789.96-27,209.78

Finding the Fourth Proportional to 80,517.38, 120,789.96 and 27,209.78

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Solution

The fourth proportional to 80,517.38, 120,789.96 and 27,209.78 is: 40,819.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,517.38 : 120,789.96 = 27,209.78 : x
  2. Step 2: Convert to fraction form
    80,517.38/120,789.96 = 27,209.78/x
  3. Step 3: Cross multiply
    80,517.38x = 120,789.96 × 27,209.78
  4. Step 4: Simplify right side
    80,517.38x = 3,286,667,633.86
  5. Step 5: Solve for x
    x = 3,286,667,633.86/80,517.38
  6. Step 6: Final answer
    x = 40,819.36

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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.