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Finding the Fourth Proportional to 54.60, 81.89 and 25.71

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Solution

The fourth proportional to 54.60, 81.89 and 25.71 is: 38.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.60 : 81.89 = 25.71 : x
  2. Step 2: Convert to fraction form
    54.60/81.89 = 25.71/x
  3. Step 3: Cross multiply
    54.60x = 81.89 × 25.71
  4. Step 4: Simplify right side
    54.60x = 2,105.26
  5. Step 5: Solve for x
    x = 2,105.26/54.60
  6. Step 6: Final answer
    x = 38.56

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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.