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Finding the Fourth Proportional to 185.43, 255.83 and 107.79

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Solution

The fourth proportional to 185.43, 255.83 and 107.79 is: 148.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.43 : 255.83 = 107.79 : x
  2. Step 2: Convert to fraction form
    185.43/255.83 = 107.79/x
  3. Step 3: Cross multiply
    185.43x = 255.83 × 107.79
  4. Step 4: Simplify right side
    185.43x = 27,575.38
  5. Step 5: Solve for x
    x = 27,575.38/185.43
  6. Step 6: Final answer
    x = 148.71

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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.