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Finding the Fourth Proportional to 57,757.62, 86,639.52 and 18,317.88

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Solution

The fourth proportional to 57,757.62, 86,639.52 and 18,317.88 is: 27,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,757.62 : 86,639.52 = 18,317.88 : x
  2. Step 2: Convert to fraction form
    57,757.62/86,639.52 = 18,317.88/x
  3. Step 3: Cross multiply
    57,757.62x = 86,639.52 × 18,317.88
  4. Step 4: Simplify right side
    57,757.62x = 1,587,052,330.62
  5. Step 5: Solve for x
    x = 1,587,052,330.62/57,757.62
  6. Step 6: Final answer
    x = 27,477.80

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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.