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Finding the Fourth Proportional to 110.85, 166.32 and 89.16

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Solution

The fourth proportional to 110.85, 166.32 and 89.16 is: 133.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.85 : 166.32 = 89.16 : x
  2. Step 2: Convert to fraction form
    110.85/166.32 = 89.16/x
  3. Step 3: Cross multiply
    110.85x = 166.32 × 89.16
  4. Step 4: Simplify right side
    110.85x = 14,829.09
  5. Step 5: Solve for x
    x = 14,829.09/110.85
  6. Step 6: Final answer
    x = 133.78

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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.