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Finding the Fourth Proportional to 105.97, 146.20 and 69.18

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Solution

The fourth proportional to 105.97, 146.20 and 69.18 is: 95.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.97 : 146.20 = 69.18 : x
  2. Step 2: Convert to fraction form
    105.97/146.20 = 69.18/x
  3. Step 3: Cross multiply
    105.97x = 146.20 × 69.18
  4. Step 4: Simplify right side
    105.97x = 10,114.12
  5. Step 5: Solve for x
    x = 10,114.12/105.97
  6. Step 6: Final answer
    x = 95.44

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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.