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Finding the Fourth Proportional to 57,686.60, 86,568.60 and 20,246.60

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Solution

The fourth proportional to 57,686.60, 86,568.60 and 20,246.60 is: 30,383.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,686.60 : 86,568.60 = 20,246.60 : x
  2. Step 2: Convert to fraction form
    57,686.60/86,568.60 = 20,246.60/x
  3. Step 3: Cross multiply
    57,686.60x = 86,568.60 × 20,246.60
  4. Step 4: Simplify right side
    57,686.60x = 1,752,719,816.76
  5. Step 5: Solve for x
    x = 1,752,719,816.76/57,686.60
  6. Step 6: Final answer
    x = 30,383.48

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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.