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Finding the Fourth Proportional to 225,806.47, 338,730.89 and 81,748.33

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Solution

The fourth proportional to 225,806.47, 338,730.89 and 81,748.33 is: 122,630.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,806.47 : 338,730.89 = 81,748.33 : x
  2. Step 2: Convert to fraction form
    225,806.47/338,730.89 = 81,748.33/x
  3. Step 3: Cross multiply
    225,806.47x = 338,730.89 × 81,748.33
  4. Step 4: Simplify right side
    225,806.47x = 27,690,684,576.91
  5. Step 5: Solve for x
    x = 27,690,684,576.91/225,806.47
  6. Step 6: Final answer
    x = 122,630.16

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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.