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Finding the Fourth Proportional to 185.58, 256.01 and 120.11

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Solution

The fourth proportional to 185.58, 256.01 and 120.11 is: 165.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.58 : 256.01 = 120.11 : x
  2. Step 2: Convert to fraction form
    185.58/256.01 = 120.11/x
  3. Step 3: Cross multiply
    185.58x = 256.01 × 120.11
  4. Step 4: Simplify right side
    185.58x = 30,747.48
  5. Step 5: Solve for x
    x = 30,747.48/185.58
  6. Step 6: Final answer
    x = 165.68

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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.