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Finding the Fourth Proportional to 167.61, 251.60 and 121.49

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Solution

The fourth proportional to 167.61, 251.60 and 121.49 is: 182.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.61 : 251.60 = 121.49 : x
  2. Step 2: Convert to fraction form
    167.61/251.60 = 121.49/x
  3. Step 3: Cross multiply
    167.61x = 251.60 × 121.49
  4. Step 4: Simplify right side
    167.61x = 30,565.02
  5. Step 5: Solve for x
    x = 30,565.02/167.61
  6. Step 6: Final answer
    x = 182.36

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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.