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Finding the Fourth Proportional to 124, 185.79 and 121.97

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Solution

The fourth proportional to 124, 185.79 and 121.97 is: 182.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    124 : 185.79 = 121.97 : x
  2. Step 2: Convert to fraction form
    124/185.79 = 121.97/x
  3. Step 3: Cross multiply
    124x = 185.79 × 121.97
  4. Step 4: Simplify right side
    124x = 22,660.81
  5. Step 5: Solve for x
    x = 22,660.81/124
  6. Step 6: Final answer
    x = 182.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.