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Finding the Fourth Proportional to 129,856.80, 194,785.20 and 50,930.40

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Solution

The fourth proportional to 129,856.80, 194,785.20 and 50,930.40 is: 76,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,856.80 : 194,785.20 = 50,930.40 : x
  2. Step 2: Convert to fraction form
    129,856.80/194,785.20 = 50,930.40/x
  3. Step 3: Cross multiply
    129,856.80x = 194,785.20 × 50,930.40
  4. Step 4: Simplify right side
    129,856.80x = 9,920,488,150.08
  5. Step 5: Solve for x
    x = 9,920,488,150.08/129,856.80
  6. Step 6: Final answer
    x = 76,395.60

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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.