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Finding the Fourth Proportional to 54, 80.76 and 37.92

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Solution

The fourth proportional to 54, 80.76 and 37.92 is: 56.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    54 : 80.76 = 37.92 : x
  2. Step 2: Convert to fraction form
    54/80.76 = 37.92/x
  3. Step 3: Cross multiply
    54x = 80.76 × 37.92
  4. Step 4: Simplify right side
    54x = 3,062.42
  5. Step 5: Solve for x
    x = 3,062.42/54
  6. Step 6: Final answer
    x = 56.71

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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.