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Finding the Fourth Proportional to 70.97, 106.57 and 67.49

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Solution

The fourth proportional to 70.97, 106.57 and 67.49 is: 101.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.97 : 106.57 = 67.49 : x
  2. Step 2: Convert to fraction form
    70.97/106.57 = 67.49/x
  3. Step 3: Cross multiply
    70.97x = 106.57 × 67.49
  4. Step 4: Simplify right side
    70.97x = 7,192.28
  5. Step 5: Solve for x
    x = 7,192.28/70.97
  6. Step 6: Final answer
    x = 101.34

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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.