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Finding the Fourth Proportional to 159.86, 220.43 and 104.58

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Solution

The fourth proportional to 159.86, 220.43 and 104.58 is: 144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.86 : 220.43 = 104.58 : x
  2. Step 2: Convert to fraction form
    159.86/220.43 = 104.58/x
  3. Step 3: Cross multiply
    159.86x = 220.43 × 104.58
  4. Step 4: Simplify right side
    159.86x = 23,052.05
  5. Step 5: Solve for x
    x = 23,052.05/159.86
  6. Step 6: Final answer
    x = 144.21

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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.