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Finding the Fourth Proportional to 57.87, 87.12 and 54.83

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Solution

The fourth proportional to 57.87, 87.12 and 54.83 is: 82.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.87 : 87.12 = 54.83 : x
  2. Step 2: Convert to fraction form
    57.87/87.12 = 54.83/x
  3. Step 3: Cross multiply
    57.87x = 87.12 × 54.83
  4. Step 4: Simplify right side
    57.87x = 4,777.01
  5. Step 5: Solve for x
    x = 4,777.01/57.87
  6. Step 6: Final answer
    x = 82.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.