Home / 87,789.28-131,377.20-71,809.60

Finding the Fourth Proportional to 87,789.28, 131,377.20 and 71,809.60

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Solution

The fourth proportional to 87,789.28, 131,377.20 and 71,809.60 is: 107,463.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,789.28 : 131,377.20 = 71,809.60 : x
  2. Step 2: Convert to fraction form
    87,789.28/131,377.20 = 71,809.60/x
  3. Step 3: Cross multiply
    87,789.28x = 131,377.20 × 71,809.60
  4. Step 4: Simplify right side
    87,789.28x = 9,434,144,181.12
  5. Step 5: Solve for x
    x = 9,434,144,181.12/87,789.28
  6. Step 6: Final answer
    x = 107,463.51

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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.