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Finding the Fourth Proportional to 159.96, 220.85 and 104.79

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Solution

The fourth proportional to 159.96, 220.85 and 104.79 is: 144.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.96 : 220.85 = 104.79 : x
  2. Step 2: Convert to fraction form
    159.96/220.85 = 104.79/x
  3. Step 3: Cross multiply
    159.96x = 220.85 × 104.79
  4. Step 4: Simplify right side
    159.96x = 23,142.35
  5. Step 5: Solve for x
    x = 23,142.35/159.96
  6. Step 6: Final answer
    x = 144.68

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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.