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Finding the Fourth Proportional to 57,959.60, 86,939.40 and 18,520.70

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Solution

The fourth proportional to 57,959.60, 86,939.40 and 18,520.70 is: 27,781.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,959.60 : 86,939.40 = 18,520.70 : x
  2. Step 2: Convert to fraction form
    57,959.60/86,939.40 = 18,520.70/x
  3. Step 3: Cross multiply
    57,959.60x = 86,939.40 × 18,520.70
  4. Step 4: Simplify right side
    57,959.60x = 1,610,178,545.58
  5. Step 5: Solve for x
    x = 1,610,178,545.58/57,959.60
  6. Step 6: Final answer
    x = 27,781.05

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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.