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Finding the Fourth Proportional to 105.82, 146.06 and 68.97

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Solution

The fourth proportional to 105.82, 146.06 and 68.97 is: 95.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.82 : 146.06 = 68.97 : x
  2. Step 2: Convert to fraction form
    105.82/146.06 = 68.97/x
  3. Step 3: Cross multiply
    105.82x = 146.06 × 68.97
  4. Step 4: Simplify right side
    105.82x = 10,073.76
  5. Step 5: Solve for x
    x = 10,073.76/105.82
  6. Step 6: Final answer
    x = 95.20

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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.