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Finding the Fourth Proportional to 112.05, 167.28 and 110.91

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Solution

The fourth proportional to 112.05, 167.28 and 110.91 is: 165.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.05 : 167.28 = 110.91 : x
  2. Step 2: Convert to fraction form
    112.05/167.28 = 110.91/x
  3. Step 3: Cross multiply
    112.05x = 167.28 × 110.91
  4. Step 4: Simplify right side
    112.05x = 18,553.02
  5. Step 5: Solve for x
    x = 18,553.02/112.05
  6. Step 6: Final answer
    x = 165.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.