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Finding the Fourth Proportional to 54.17, 81.10 and 31.29

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Solution

The fourth proportional to 54.17, 81.10 and 31.29 is: 46.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.17 : 81.10 = 31.29 : x
  2. Step 2: Convert to fraction form
    54.17/81.10 = 31.29/x
  3. Step 3: Cross multiply
    54.17x = 81.10 × 31.29
  4. Step 4: Simplify right side
    54.17x = 2,537.35
  5. Step 5: Solve for x
    x = 2,537.35/54.17
  6. Step 6: Final answer
    x = 46.84

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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.