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Finding the Fourth Proportional to 57,843.60, 86,771.78 and 18,391.49

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Solution

The fourth proportional to 57,843.60, 86,771.78 and 18,391.49 is: 27,589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,843.60 : 86,771.78 = 18,391.49 : x
  2. Step 2: Convert to fraction form
    57,843.60/86,771.78 = 18,391.49/x
  3. Step 3: Cross multiply
    57,843.60x = 86,771.78 × 18,391.49
  4. Step 4: Simplify right side
    57,843.60x = 1,595,861,798.34
  5. Step 5: Solve for x
    x = 1,595,861,798.34/57,843.60
  6. Step 6: Final answer
    x = 27,589.25

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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.