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Finding the Fourth Proportional to 129,480.48, 178,709.76 and 75,793.68

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Solution

The fourth proportional to 129,480.48, 178,709.76 and 75,793.68 is: 104,610.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,480.48 : 178,709.76 = 75,793.68 : x
  2. Step 2: Convert to fraction form
    129,480.48/178,709.76 = 75,793.68/x
  3. Step 3: Cross multiply
    129,480.48x = 178,709.76 × 75,793.68
  4. Step 4: Simplify right side
    129,480.48x = 13,545,070,362.32
  5. Step 5: Solve for x
    x = 13,545,070,362.32/129,480.48
  6. Step 6: Final answer
    x = 104,610.91

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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.