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Finding the Fourth Proportional to 167.39, 230.87 and 112.21

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Solution

The fourth proportional to 167.39, 230.87 and 112.21 is: 154.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.39 : 230.87 = 112.21 : x
  2. Step 2: Convert to fraction form
    167.39/230.87 = 112.21/x
  3. Step 3: Cross multiply
    167.39x = 230.87 × 112.21
  4. Step 4: Simplify right side
    167.39x = 25,904.77
  5. Step 5: Solve for x
    x = 25,904.77/167.39
  6. Step 6: Final answer
    x = 154.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.