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Finding the Fourth Proportional to 57,863.15, 86,793.80 and 18,419.70

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Solution

The fourth proportional to 57,863.15, 86,793.80 and 18,419.70 is: 27,629.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,863.15 : 86,793.80 = 18,419.70 : x
  2. Step 2: Convert to fraction form
    57,863.15/86,793.80 = 18,419.70/x
  3. Step 3: Cross multiply
    57,863.15x = 86,793.80 × 18,419.70
  4. Step 4: Simplify right side
    57,863.15x = 1,598,715,665.76
  5. Step 5: Solve for x
    x = 1,598,715,665.76/57,863.15
  6. Step 6: Final answer
    x = 27,629.26

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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.