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Finding the Fourth Proportional to 129,373.83, 178,508.88 and 75,648.42

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Solution

The fourth proportional to 129,373.83, 178,508.88 and 75,648.42 is: 104,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,373.83 : 178,508.88 = 75,648.42 : x
  2. Step 2: Convert to fraction form
    129,373.83/178,508.88 = 75,648.42/x
  3. Step 3: Cross multiply
    129,373.83x = 178,508.88 × 75,648.42
  4. Step 4: Simplify right side
    129,373.83x = 13,503,914,727.97
  5. Step 5: Solve for x
    x = 13,503,914,727.97/129,373.83
  6. Step 6: Final answer
    x = 104,379.03

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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.