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Finding the Fourth Proportional to 121.44, 167.94 and 110.55

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Solution

The fourth proportional to 121.44, 167.94 and 110.55 is: 152.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.44 : 167.94 = 110.55 : x
  2. Step 2: Convert to fraction form
    121.44/167.94 = 110.55/x
  3. Step 3: Cross multiply
    121.44x = 167.94 × 110.55
  4. Step 4: Simplify right side
    121.44x = 18,565.77
  5. Step 5: Solve for x
    x = 18,565.77/121.44
  6. Step 6: Final answer
    x = 152.88

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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.