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Finding the Fourth Proportional to 57,817.20, 86,728.20 and 18,373.20

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Solution

The fourth proportional to 57,817.20, 86,728.20 and 18,373.20 is: 27,560.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,817.20 : 86,728.20 = 18,373.20 : x
  2. Step 2: Convert to fraction form
    57,817.20/86,728.20 = 18,373.20/x
  3. Step 3: Cross multiply
    57,817.20x = 86,728.20 × 18,373.20
  4. Step 4: Simplify right side
    57,817.20x = 1,593,474,564.24
  5. Step 5: Solve for x
    x = 1,593,474,564.24/57,817.20
  6. Step 6: Final answer
    x = 27,560.56

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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.