Home / 87,725.60-131,204.40-78,432.80

Finding the Fourth Proportional to 87,725.60, 131,204.40 and 78,432.80

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Solution

The fourth proportional to 87,725.60, 131,204.40 and 78,432.80 is: 117,305.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,725.60 : 131,204.40 = 78,432.80 : x
  2. Step 2: Convert to fraction form
    87,725.60/131,204.40 = 78,432.80/x
  3. Step 3: Cross multiply
    87,725.60x = 131,204.40 × 78,432.80
  4. Step 4: Simplify right side
    87,725.60x = 10,290,728,464.32
  5. Step 5: Solve for x
    x = 10,290,728,464.32/87,725.60
  6. Step 6: Final answer
    x = 117,305.88

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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.