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Finding the Fourth Proportional to 128,757.60, 193,233.60 and 48,865.68

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Solution

The fourth proportional to 128,757.60, 193,233.60 and 48,865.68 is: 73,335.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,757.60 : 193,233.60 = 48,865.68 : x
  2. Step 2: Convert to fraction form
    128,757.60/193,233.60 = 48,865.68/x
  3. Step 3: Cross multiply
    128,757.60x = 193,233.60 × 48,865.68
  4. Step 4: Simplify right side
    128,757.60x = 9,442,491,262.85
  5. Step 5: Solve for x
    x = 9,442,491,262.85/128,757.60
  6. Step 6: Final answer
    x = 73,335.41

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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.