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Finding the Fourth Proportional to 107.38, 148.81 and 105.76

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Solution

The fourth proportional to 107.38, 148.81 and 105.76 is: 146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.38 : 148.81 = 105.76 : x
  2. Step 2: Convert to fraction form
    107.38/148.81 = 105.76/x
  3. Step 3: Cross multiply
    107.38x = 148.81 × 105.76
  4. Step 4: Simplify right side
    107.38x = 15,738.15
  5. Step 5: Solve for x
    x = 15,738.15/107.38
  6. Step 6: Final answer
    x = 146.56

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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.