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Finding the Fourth Proportional to 159.17, 219.44 and 106.72

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Solution

The fourth proportional to 159.17, 219.44 and 106.72 is: 147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.17 : 219.44 = 106.72 : x
  2. Step 2: Convert to fraction form
    159.17/219.44 = 106.72/x
  3. Step 3: Cross multiply
    159.17x = 219.44 × 106.72
  4. Step 4: Simplify right side
    159.17x = 23,418.64
  5. Step 5: Solve for x
    x = 23,418.64/159.17
  6. Step 6: Final answer
    x = 147.13

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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.