Home / 138,385.70-207,644.15-82,336.53

Finding the Fourth Proportional to 138,385.70, 207,644.15 and 82,336.53

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Solution

The fourth proportional to 138,385.70, 207,644.15 and 82,336.53 is: 123,543.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,385.70 : 207,644.15 = 82,336.53 : x
  2. Step 2: Convert to fraction form
    138,385.70/207,644.15 = 82,336.53/x
  3. Step 3: Cross multiply
    138,385.70x = 207,644.15 × 82,336.53
  4. Step 4: Simplify right side
    138,385.70x = 17,096,698,785.80
  5. Step 5: Solve for x
    x = 17,096,698,785.80/138,385.70
  6. Step 6: Final answer
    x = 123,543.83

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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.