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Finding the Fourth Proportional to 195.24, 269.36 and 121.56

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Solution

The fourth proportional to 195.24, 269.36 and 121.56 is: 167.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.24 : 269.36 = 121.56 : x
  2. Step 2: Convert to fraction form
    195.24/269.36 = 121.56/x
  3. Step 3: Cross multiply
    195.24x = 269.36 × 121.56
  4. Step 4: Simplify right side
    195.24x = 32,743.40
  5. Step 5: Solve for x
    x = 32,743.40/195.24
  6. Step 6: Final answer
    x = 167.71

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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.