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Finding the Fourth Proportional to 225,711.68, 338,469.08 and 85,371.89

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Solution

The fourth proportional to 225,711.68, 338,469.08 and 85,371.89 is: 128,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,711.68 : 338,469.08 = 85,371.89 : x
  2. Step 2: Convert to fraction form
    225,711.68/338,469.08 = 85,371.89/x
  3. Step 3: Cross multiply
    225,711.68x = 338,469.08 × 85,371.89
  4. Step 4: Simplify right side
    225,711.68x = 28,895,743,587.25
  5. Step 5: Solve for x
    x = 28,895,743,587.25/225,711.68
  6. Step 6: Final answer
    x = 128,020.60

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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.