Home / 87,489.24-131,391.93-80,456.28

Finding the Fourth Proportional to 87,489.24, 131,391.93 and 80,456.28

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Solution

The fourth proportional to 87,489.24, 131,391.93 and 80,456.28 is: 120,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,489.24 : 131,391.93 = 80,456.28 : x
  2. Step 2: Convert to fraction form
    87,489.24/131,391.93 = 80,456.28/x
  3. Step 3: Cross multiply
    87,489.24x = 131,391.93 × 80,456.28
  4. Step 4: Simplify right side
    87,489.24x = 10,571,305,909.82
  5. Step 5: Solve for x
    x = 10,571,305,909.82/87,489.24
  6. Step 6: Final answer
    x = 120,829.78

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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.