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Finding the Fourth Proportional to 74.27, 102.41 and 61.11

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Solution

The fourth proportional to 74.27, 102.41 and 61.11 is: 84.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.27 : 102.41 = 61.11 : x
  2. Step 2: Convert to fraction form
    74.27/102.41 = 61.11/x
  3. Step 3: Cross multiply
    74.27x = 102.41 × 61.11
  4. Step 4: Simplify right side
    74.27x = 6,257.97
  5. Step 5: Solve for x
    x = 6,257.97/74.27
  6. Step 6: Final answer
    x = 84.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.