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Finding the Fourth Proportional to 106.97, 160.56 and 68.49

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Solution

The fourth proportional to 106.97, 160.56 and 68.49 is: 102.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.97 : 160.56 = 68.49 : x
  2. Step 2: Convert to fraction form
    106.97/160.56 = 68.49/x
  3. Step 3: Cross multiply
    106.97x = 160.56 × 68.49
  4. Step 4: Simplify right side
    106.97x = 10,996.75
  5. Step 5: Solve for x
    x = 10,996.75/106.97
  6. Step 6: Final answer
    x = 102.81

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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.