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Finding the Third Proportional to 106.31 and 159.47

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Solution

The third proportional to 106.31 and 159.47 is: 239.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.31 : 159.47 = 159.47 : x
  2. Step 2: Convert to fraction form
    106.31/159.47 = 159.47/x
  3. Step 3: Cross multiply
    106.31x = 159.47 × 159.47
  4. Step 4: Simplify right side
    106.31x = 25,430.28
  5. Step 5: Solve for x
    x = 25,430.28/106.31
  6. Step 6: Final answer
    x = 239.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.