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Finding the Fourth Proportional to 112.55, 167.38 and 111.33

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Solution

The fourth proportional to 112.55, 167.38 and 111.33 is: 165.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.55 : 167.38 = 111.33 : x
  2. Step 2: Convert to fraction form
    112.55/167.38 = 111.33/x
  3. Step 3: Cross multiply
    112.55x = 167.38 × 111.33
  4. Step 4: Simplify right side
    112.55x = 18,634.14
  5. Step 5: Solve for x
    x = 18,634.14/112.55
  6. Step 6: Final answer
    x = 165.57

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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.