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Finding the Fourth Proportional to 110.82, 166.17 and 91.50

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Solution

The fourth proportional to 110.82, 166.17 and 91.50 is: 137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.82 : 166.17 = 91.50 : x
  2. Step 2: Convert to fraction form
    110.82/166.17 = 91.50/x
  3. Step 3: Cross multiply
    110.82x = 166.17 × 91.50
  4. Step 4: Simplify right side
    110.82x = 15,204.56
  5. Step 5: Solve for x
    x = 15,204.56/110.82
  6. Step 6: Final answer
    x = 137.20

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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.