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Finding the Fourth Proportional to 225,916.91, 338,776.92 and 76,129.28

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Solution

The fourth proportional to 225,916.91, 338,776.92 and 76,129.28 is: 114,160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,916.91 : 338,776.92 = 76,129.28 : x
  2. Step 2: Convert to fraction form
    225,916.91/338,776.92 = 76,129.28/x
  3. Step 3: Cross multiply
    225,916.91x = 338,776.92 × 76,129.28
  4. Step 4: Simplify right side
    225,916.91x = 25,790,841,306.33
  5. Step 5: Solve for x
    x = 25,790,841,306.33/225,916.91
  6. Step 6: Final answer
    x = 114,160.74

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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.