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Finding the Fourth Proportional to 195.28, 269.49 and 121.63

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Solution

The fourth proportional to 195.28, 269.49 and 121.63 is: 167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.28 : 269.49 = 121.63 : x
  2. Step 2: Convert to fraction form
    195.28/269.49 = 121.63/x
  3. Step 3: Cross multiply
    195.28x = 269.49 × 121.63
  4. Step 4: Simplify right side
    195.28x = 32,778.07
  5. Step 5: Solve for x
    x = 32,778.07/195.28
  6. Step 6: Final answer
    x = 167.85

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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.