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Finding the Fourth Proportional to 111.88, 168.44 and 110.80

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Solution

The fourth proportional to 111.88, 168.44 and 110.80 is: 166.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.88 : 168.44 = 110.80 : x
  2. Step 2: Convert to fraction form
    111.88/168.44 = 110.80/x
  3. Step 3: Cross multiply
    111.88x = 168.44 × 110.80
  4. Step 4: Simplify right side
    111.88x = 18,663.15
  5. Step 5: Solve for x
    x = 18,663.15/111.88
  6. Step 6: Final answer
    x = 166.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.