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Finding the Fourth Proportional to 121.13, 167.17 and 68.66

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Solution

The fourth proportional to 121.13, 167.17 and 68.66 is: 94.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.13 : 167.17 = 68.66 : x
  2. Step 2: Convert to fraction form
    121.13/167.17 = 68.66/x
  3. Step 3: Cross multiply
    121.13x = 167.17 × 68.66
  4. Step 4: Simplify right side
    121.13x = 11,477.90
  5. Step 5: Solve for x
    x = 11,477.90/121.13
  6. Step 6: Final answer
    x = 94.75

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