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Finding the Fourth Proportional to 342,793.87, 513,910.27 and 129,440.75

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Solution

The fourth proportional to 342,793.87, 513,910.27 and 129,440.75 is: 194,055.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,793.87 : 513,910.27 = 129,440.75 : x
  2. Step 2: Convert to fraction form
    342,793.87/513,910.27 = 129,440.75/x
  3. Step 3: Cross multiply
    342,793.87x = 513,910.27 × 129,440.75
  4. Step 4: Simplify right side
    342,793.87x = 66,520,928,373.75
  5. Step 5: Solve for x
    x = 66,520,928,373.75/342,793.87
  6. Step 6: Final answer
    x = 194,055.19

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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.