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Finding the Fourth Proportional to 81.92, 122.73 and 41.37

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Solution

The fourth proportional to 81.92, 122.73 and 41.37 is: 61.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.92 : 122.73 = 41.37 : x
  2. Step 2: Convert to fraction form
    81.92/122.73 = 41.37/x
  3. Step 3: Cross multiply
    81.92x = 122.73 × 41.37
  4. Step 4: Simplify right side
    81.92x = 5,077.34
  5. Step 5: Solve for x
    x = 5,077.34/81.92
  6. Step 6: Final answer
    x = 61.98

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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.