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Finding the Fourth Proportional to 225,711.35, 338,468.60 and 85,371.56

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Solution

The fourth proportional to 225,711.35, 338,468.60 and 85,371.56 is: 128,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,711.35 : 338,468.60 = 85,371.56 : x
  2. Step 2: Convert to fraction form
    225,711.35/338,468.60 = 85,371.56/x
  3. Step 3: Cross multiply
    225,711.35x = 338,468.60 × 85,371.56
  4. Step 4: Simplify right side
    225,711.35x = 28,895,590,273.82
  5. Step 5: Solve for x
    x = 28,895,590,273.82/225,711.35
  6. Step 6: Final answer
    x = 128,020.11

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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.