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Finding the Fourth Proportional to 54.42, 81.92 and 44.43

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Solution

The fourth proportional to 54.42, 81.92 and 44.43 is: 66.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.42 : 81.92 = 44.43 : x
  2. Step 2: Convert to fraction form
    54.42/81.92 = 44.43/x
  3. Step 3: Cross multiply
    54.42x = 81.92 × 44.43
  4. Step 4: Simplify right side
    54.42x = 3,639.48
  5. Step 5: Solve for x
    x = 3,639.48/54.42
  6. Step 6: Final answer
    x = 66.88

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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.