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Finding the Fourth Proportional to 108.41, 149.61 and 80.73

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Solution

The fourth proportional to 108.41, 149.61 and 80.73 is: 111.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.41 : 149.61 = 80.73 : x
  2. Step 2: Convert to fraction form
    108.41/149.61 = 80.73/x
  3. Step 3: Cross multiply
    108.41x = 149.61 × 80.73
  4. Step 4: Simplify right side
    108.41x = 12,078.32
  5. Step 5: Solve for x
    x = 12,078.32/108.41
  6. Step 6: Final answer
    x = 111.42

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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.