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Finding the Fourth Proportional to 87,870.60, 131,805.90 and 38,718.60

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Solution

The fourth proportional to 87,870.60, 131,805.90 and 38,718.60 is: 58,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,870.60 : 131,805.90 = 38,718.60 : x
  2. Step 2: Convert to fraction form
    87,870.60/131,805.90 = 38,718.60/x
  3. Step 3: Cross multiply
    87,870.60x = 131,805.90 × 38,718.60
  4. Step 4: Simplify right side
    87,870.60x = 5,103,339,919.74
  5. Step 5: Solve for x
    x = 5,103,339,919.74/87,870.60
  6. Step 6: Final answer
    x = 58,077.90

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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.