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Finding the Fourth Proportional to 159.03, 219.20 and 122.18

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Solution

The fourth proportional to 159.03, 219.20 and 122.18 is: 168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.03 : 219.20 = 122.18 : x
  2. Step 2: Convert to fraction form
    159.03/219.20 = 122.18/x
  3. Step 3: Cross multiply
    159.03x = 219.20 × 122.18
  4. Step 4: Simplify right side
    159.03x = 26,780.15
  5. Step 5: Solve for x
    x = 26,780.15/159.03
  6. Step 6: Final answer
    x = 168.40

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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.