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Finding the Fourth Proportional to 121.08, 167.11 and 68.62

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Solution

The fourth proportional to 121.08, 167.11 and 68.62 is: 94.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.08 : 167.11 = 68.62 : x
  2. Step 2: Convert to fraction form
    121.08/167.11 = 68.62/x
  3. Step 3: Cross multiply
    121.08x = 167.11 × 68.62
  4. Step 4: Simplify right side
    121.08x = 11,467.09
  5. Step 5: Solve for x
    x = 11,467.09/121.08
  6. Step 6: Final answer
    x = 94.71

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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.