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Finding the Fourth Proportional to 129,940.40, 194,910.60 and 63,423.20

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Solution

The fourth proportional to 129,940.40, 194,910.60 and 63,423.20 is: 95,134.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.40 : 194,910.60 = 63,423.20 : x
  2. Step 2: Convert to fraction form
    129,940.40/194,910.60 = 63,423.20/x
  3. Step 3: Cross multiply
    129,940.40x = 194,910.60 × 63,423.20
  4. Step 4: Simplify right side
    129,940.40x = 12,361,853,965.92
  5. Step 5: Solve for x
    x = 12,361,853,965.92/129,940.40
  6. Step 6: Final answer
    x = 95,134.80

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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.