Home / 83,132.10-124,698.15-81,819.90

Finding the Fourth Proportional to 83,132.10, 124,698.15 and 81,819.90

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Solution

The fourth proportional to 83,132.10, 124,698.15 and 81,819.90 is: 122,729.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,132.10 : 124,698.15 = 81,819.90 : x
  2. Step 2: Convert to fraction form
    83,132.10/124,698.15 = 81,819.90/x
  3. Step 3: Cross multiply
    83,132.10x = 124,698.15 × 81,819.90
  4. Step 4: Simplify right side
    83,132.10x = 10,202,790,163.19
  5. Step 5: Solve for x
    x = 10,202,790,163.19/83,132.10
  6. Step 6: Final answer
    x = 122,729.85

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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.