Home / 87,987.10-131,721.45-82,860.70

Finding the Fourth Proportional to 87,987.10, 131,721.45 and 82,860.70

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Solution

The fourth proportional to 87,987.10, 131,721.45 and 82,860.70 is: 124,046.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.10 : 131,721.45 = 82,860.70 : x
  2. Step 2: Convert to fraction form
    87,987.10/131,721.45 = 82,860.70/x
  3. Step 3: Cross multiply
    87,987.10x = 131,721.45 × 82,860.70
  4. Step 4: Simplify right side
    87,987.10x = 10,914,531,552.02
  5. Step 5: Solve for x
    x = 10,914,531,552.02/87,987.10
  6. Step 6: Final answer
    x = 124,046.95

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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.