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Finding the Fourth Proportional to 129,794.40, 194,691.60 and 79,930.80

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Solution

The fourth proportional to 129,794.40, 194,691.60 and 79,930.80 is: 119,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,794.40 : 194,691.60 = 79,930.80 : x
  2. Step 2: Convert to fraction form
    129,794.40/194,691.60 = 79,930.80/x
  3. Step 3: Cross multiply
    129,794.40x = 194,691.60 × 79,930.80
  4. Step 4: Simplify right side
    129,794.40x = 15,561,855,341.28
  5. Step 5: Solve for x
    x = 15,561,855,341.28/129,794.40
  6. Step 6: Final answer
    x = 119,896.20

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1.5x scale

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.