Home / 100,220.20-138,306.11-57,198.83

Finding the Fourth Proportional to 100,220.20, 138,306.11 and 57,198.83

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Solution

The fourth proportional to 100,220.20, 138,306.11 and 57,198.83 is: 78,935.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.20 : 138,306.11 = 57,198.83 : x
  2. Step 2: Convert to fraction form
    100,220.20/138,306.11 = 57,198.83/x
  3. Step 3: Cross multiply
    100,220.20x = 138,306.11 × 57,198.83
  4. Step 4: Simplify right side
    100,220.20x = 7,910,948,024.16
  5. Step 5: Solve for x
    x = 7,910,948,024.16/100,220.20
  6. Step 6: Final answer
    x = 78,935.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.