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Finding the Fourth Proportional to 119.72, 179.38 and 104.48

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Solution

The fourth proportional to 119.72, 179.38 and 104.48 is: 156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.72 : 179.38 = 104.48 : x
  2. Step 2: Convert to fraction form
    119.72/179.38 = 104.48/x
  3. Step 3: Cross multiply
    119.72x = 179.38 × 104.48
  4. Step 4: Simplify right side
    119.72x = 18,741.62
  5. Step 5: Solve for x
    x = 18,741.62/119.72
  6. Step 6: Final answer
    x = 156.55

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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.