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Finding the Fourth Proportional to 159.16, 219.67 and 106.79

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Solution

The fourth proportional to 159.16, 219.67 and 106.79 is: 147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.16 : 219.67 = 106.79 : x
  2. Step 2: Convert to fraction form
    159.16/219.67 = 106.79/x
  3. Step 3: Cross multiply
    159.16x = 219.67 × 106.79
  4. Step 4: Simplify right side
    159.16x = 23,458.42
  5. Step 5: Solve for x
    x = 23,458.42/159.16
  6. Step 6: Final answer
    x = 147.39

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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.