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Finding the Fourth Proportional to 167.63, 251.20 and 121.37

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Solution

The fourth proportional to 167.63, 251.20 and 121.37 is: 181.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.63 : 251.20 = 121.37 : x
  2. Step 2: Convert to fraction form
    167.63/251.20 = 121.37/x
  3. Step 3: Cross multiply
    167.63x = 251.20 × 121.37
  4. Step 4: Simplify right side
    167.63x = 30,488.14
  5. Step 5: Solve for x
    x = 30,488.14/167.63
  6. Step 6: Final answer
    x = 181.88

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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.