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Finding the Fourth Proportional to 119.82, 179.69 and 38.62

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Solution

The fourth proportional to 119.82, 179.69 and 38.62 is: 57.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.82 : 179.69 = 38.62 : x
  2. Step 2: Convert to fraction form
    119.82/179.69 = 38.62/x
  3. Step 3: Cross multiply
    119.82x = 179.69 × 38.62
  4. Step 4: Simplify right side
    119.82x = 6,939.28
  5. Step 5: Solve for x
    x = 6,939.28/119.82
  6. Step 6: Final answer
    x = 57.91

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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.