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Finding the Fourth Proportional to 159.89, 220.59 and 118.55

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Solution

The fourth proportional to 159.89, 220.59 and 118.55 is: 163.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.89 : 220.59 = 118.55 : x
  2. Step 2: Convert to fraction form
    159.89/220.59 = 118.55/x
  3. Step 3: Cross multiply
    159.89x = 220.59 × 118.55
  4. Step 4: Simplify right side
    159.89x = 26,149.84
  5. Step 5: Solve for x
    x = 26,149.84/159.89
  6. Step 6: Final answer
    x = 163.55

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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.