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Finding the Fourth Proportional to 342,239.20, 513,393.99 and 129,186.57

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Solution

The fourth proportional to 342,239.20, 513,393.99 and 129,186.57 is: 193,793.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,239.20 : 513,393.99 = 129,186.57 : x
  2. Step 2: Convert to fraction form
    342,239.20/513,393.99 = 129,186.57/x
  3. Step 3: Cross multiply
    342,239.20x = 513,393.99 × 129,186.57
  4. Step 4: Simplify right side
    342,239.20x = 66,323,608,626.71
  5. Step 5: Solve for x
    x = 66,323,608,626.71/342,239.20
  6. Step 6: Final answer
    x = 193,793.14

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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.