Home / 87,708.60-131,721.30-76,822.20

Finding the Fourth Proportional to 87,708.60, 131,721.30 and 76,822.20

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Solution

The fourth proportional to 87,708.60, 131,721.30 and 76,822.20 is: 115,372.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,708.60 : 131,721.30 = 76,822.20 : x
  2. Step 2: Convert to fraction form
    87,708.60/131,721.30 = 76,822.20/x
  3. Step 3: Cross multiply
    87,708.60x = 131,721.30 × 76,822.20
  4. Step 4: Simplify right side
    87,708.60x = 10,119,120,052.86
  5. Step 5: Solve for x
    x = 10,119,120,052.86/87,708.60
  6. Step 6: Final answer
    x = 115,372.04

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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.