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Finding the Fourth Proportional to 185.70, 256.17 and 120.27

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Solution

The fourth proportional to 185.70, 256.17 and 120.27 is: 165.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.70 : 256.17 = 120.27 : x
  2. Step 2: Convert to fraction form
    185.70/256.17 = 120.27/x
  3. Step 3: Cross multiply
    185.70x = 256.17 × 120.27
  4. Step 4: Simplify right side
    185.70x = 30,809.57
  5. Step 5: Solve for x
    x = 30,809.57/185.70
  6. Step 6: Final answer
    x = 165.91

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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.