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Finding the Fourth Proportional to 159.85, 220.51 and 104.61

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Solution

The fourth proportional to 159.85, 220.51 and 104.61 is: 144.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.85 : 220.51 = 104.61 : x
  2. Step 2: Convert to fraction form
    159.85/220.51 = 104.61/x
  3. Step 3: Cross multiply
    159.85x = 220.51 × 104.61
  4. Step 4: Simplify right side
    159.85x = 23,067.55
  5. Step 5: Solve for x
    x = 23,067.55/159.85
  6. Step 6: Final answer
    x = 144.31

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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.