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Finding the Fourth Proportional to 121.44, 167.67 and 88.86

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Solution

The fourth proportional to 121.44, 167.67 and 88.86 is: 122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.44 : 167.67 = 88.86 : x
  2. Step 2: Convert to fraction form
    121.44/167.67 = 88.86/x
  3. Step 3: Cross multiply
    121.44x = 167.67 × 88.86
  4. Step 4: Simplify right side
    121.44x = 14,899.16
  5. Step 5: Solve for x
    x = 14,899.16/121.44
  6. Step 6: Final answer
    x = 122.69

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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.