Home / 87,863.10-131,794.65-81,987.90

Finding the Fourth Proportional to 87,863.10, 131,794.65 and 81,987.90

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Solution

The fourth proportional to 87,863.10, 131,794.65 and 81,987.90 is: 122,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,863.10 : 131,794.65 = 81,987.90 : x
  2. Step 2: Convert to fraction form
    87,863.10/131,794.65 = 81,987.90/x
  3. Step 3: Cross multiply
    87,863.10x = 131,794.65 × 81,987.90
  4. Step 4: Simplify right side
    87,863.10x = 10,805,566,584.74
  5. Step 5: Solve for x
    x = 10,805,566,584.74/87,863.10
  6. Step 6: Final answer
    x = 122,981.85

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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.