Home / 87,707.10-131,431.05-74,487.90

Finding the Fourth Proportional to 87,707.10, 131,431.05 and 74,487.90

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Solution

The fourth proportional to 87,707.10, 131,431.05 and 74,487.90 is: 111,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,707.10 : 131,431.05 = 74,487.90 : x
  2. Step 2: Convert to fraction form
    87,707.10/131,431.05 = 74,487.90/x
  3. Step 3: Cross multiply
    87,707.10x = 131,431.05 × 74,487.90
  4. Step 4: Simplify right side
    87,707.10x = 9,790,022,909.30
  5. Step 5: Solve for x
    x = 9,790,022,909.30/87,707.10
  6. Step 6: Final answer
    x = 111,621.78

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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.