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Finding the Fourth Proportional to 132.73, 183.18 and 121.79

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Solution

The fourth proportional to 132.73, 183.18 and 121.79 is: 168.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.73 : 183.18 = 121.79 : x
  2. Step 2: Convert to fraction form
    132.73/183.18 = 121.79/x
  3. Step 3: Cross multiply
    132.73x = 183.18 × 121.79
  4. Step 4: Simplify right side
    132.73x = 22,309.49
  5. Step 5: Solve for x
    x = 22,309.49/132.73
  6. Step 6: Final answer
    x = 168.08

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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.