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Finding the Fourth Proportional to 110.73, 166.15 and 108.91

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Solution

The fourth proportional to 110.73, 166.15 and 108.91 is: 163.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.73 : 166.15 = 108.91 : x
  2. Step 2: Convert to fraction form
    110.73/166.15 = 108.91/x
  3. Step 3: Cross multiply
    110.73x = 166.15 × 108.91
  4. Step 4: Simplify right side
    110.73x = 18,095.40
  5. Step 5: Solve for x
    x = 18,095.40/110.73
  6. Step 6: Final answer
    x = 163.42

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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.