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Finding the Fourth Proportional to 185.96, 256.38 and 120.36

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Solution

The fourth proportional to 185.96, 256.38 and 120.36 is: 165.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.96 : 256.38 = 120.36 : x
  2. Step 2: Convert to fraction form
    185.96/256.38 = 120.36/x
  3. Step 3: Cross multiply
    185.96x = 256.38 × 120.36
  4. Step 4: Simplify right side
    185.96x = 30,857.90
  5. Step 5: Solve for x
    x = 30,857.90/185.96
  6. Step 6: Final answer
    x = 165.94

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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.