Home / 87,919.70-131,502.76-81,538.11

Finding the Fourth Proportional to 87,919.70, 131,502.76 and 81,538.11

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Solution

The fourth proportional to 87,919.70, 131,502.76 and 81,538.11 is: 121,957.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,919.70 : 131,502.76 = 81,538.11 : x
  2. Step 2: Convert to fraction form
    87,919.70/131,502.76 = 81,538.11/x
  3. Step 3: Cross multiply
    87,919.70x = 131,502.76 × 81,538.11
  4. Step 4: Simplify right side
    87,919.70x = 10,722,486,306.34
  5. Step 5: Solve for x
    x = 10,722,486,306.34/87,919.70
  6. Step 6: Final answer
    x = 121,957.73

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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.