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Finding the Fourth Proportional to 68,753.92, 94,874.52 and 38,128

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Solution

The fourth proportional to 68,753.92, 94,874.52 and 38,128 is: 52,613.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,753.92 : 94,874.52 = 38,128 : x
  2. Step 2: Convert to fraction form
    68,753.92/94,874.52 = 38,128/x
  3. Step 3: Cross multiply
    68,753.92x = 94,874.52 × 38,128
  4. Step 4: Simplify right side
    68,753.92x = 3,617,375,698.56
  5. Step 5: Solve for x
    x = 3,617,375,698.56/68,753.92
  6. Step 6: Final answer
    x = 52,613.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.