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Finding the Fourth Proportional to 87,853.67, 131,687.21 and 45,691.55

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Solution

The fourth proportional to 87,853.67, 131,687.21 and 45,691.55 is: 68,488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,853.67 : 131,687.21 = 45,691.55 : x
  2. Step 2: Convert to fraction form
    87,853.67/131,687.21 = 45,691.55/x
  3. Step 3: Cross multiply
    87,853.67x = 131,687.21 × 45,691.55
  4. Step 4: Simplify right side
    87,853.67x = 6,016,992,931.56
  5. Step 5: Solve for x
    x = 6,016,992,931.56/87,853.67
  6. Step 6: Final answer
    x = 68,488.81

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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.