Home / 87,621.60-131,432.40-54,379.20

Finding the Fourth Proportional to 87,621.60, 131,432.40 and 54,379.20

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Solution

The fourth proportional to 87,621.60, 131,432.40 and 54,379.20 is: 81,568.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,621.60 : 131,432.40 = 54,379.20 : x
  2. Step 2: Convert to fraction form
    87,621.60/131,432.40 = 54,379.20/x
  3. Step 3: Cross multiply
    87,621.60x = 131,432.40 × 54,379.20
  4. Step 4: Simplify right side
    87,621.60x = 7,147,188,766.08
  5. Step 5: Solve for x
    x = 7,147,188,766.08/87,621.60
  6. Step 6: Final answer
    x = 81,568.80

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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.