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Finding the Fourth Proportional to 57,176.60, 78,874.68 and 39,013.70

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Solution

The fourth proportional to 57,176.60, 78,874.68 and 39,013.70 is: 53,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,176.60 : 78,874.68 = 39,013.70 : x
  2. Step 2: Convert to fraction form
    57,176.60/78,874.68 = 39,013.70/x
  3. Step 3: Cross multiply
    57,176.60x = 78,874.68 × 39,013.70
  4. Step 4: Simplify right side
    57,176.60x = 3,077,193,103.12
  5. Step 5: Solve for x
    x = 3,077,193,103.12/57,176.60
  6. Step 6: Final answer
    x = 53,819.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.