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Finding the Fourth Proportional to 119.97, 179.78 and 104.72

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Solution

The fourth proportional to 119.97, 179.78 and 104.72 is: 156.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.97 : 179.78 = 104.72 : x
  2. Step 2: Convert to fraction form
    119.97/179.78 = 104.72/x
  3. Step 3: Cross multiply
    119.97x = 179.78 × 104.72
  4. Step 4: Simplify right side
    119.97x = 18,825.14
  5. Step 5: Solve for x
    x = 18,825.14/119.97
  6. Step 6: Final answer
    x = 156.92

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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.