Home / 87,966.30-131,949.45-81,207.90

Finding the Fourth Proportional to 87,966.30, 131,949.45 and 81,207.90

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Solution

The fourth proportional to 87,966.30, 131,949.45 and 81,207.90 is: 121,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,966.30 : 131,949.45 = 81,207.90 : x
  2. Step 2: Convert to fraction form
    87,966.30/131,949.45 = 81,207.90/x
  3. Step 3: Cross multiply
    87,966.30x = 131,949.45 × 81,207.90
  4. Step 4: Simplify right side
    87,966.30x = 10,715,337,740.66
  5. Step 5: Solve for x
    x = 10,715,337,740.66/87,966.30
  6. Step 6: Final answer
    x = 121,811.85

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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.