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Finding the Fourth Proportional to 105.68, 146.45 and 104.38

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Solution

The fourth proportional to 105.68, 146.45 and 104.38 is: 144.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.68 : 146.45 = 104.38 : x
  2. Step 2: Convert to fraction form
    105.68/146.45 = 104.38/x
  3. Step 3: Cross multiply
    105.68x = 146.45 × 104.38
  4. Step 4: Simplify right side
    105.68x = 15,286.35
  5. Step 5: Solve for x
    x = 15,286.35/105.68
  6. Step 6: Final answer
    x = 144.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.