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Finding the Fourth Proportional to 107.52, 149.06 and 103.76

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Solution

The fourth proportional to 107.52, 149.06 and 103.76 is: 143.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.52 : 149.06 = 103.76 : x
  2. Step 2: Convert to fraction form
    107.52/149.06 = 103.76/x
  3. Step 3: Cross multiply
    107.52x = 149.06 × 103.76
  4. Step 4: Simplify right side
    107.52x = 15,466.47
  5. Step 5: Solve for x
    x = 15,466.47/107.52
  6. Step 6: Final answer
    x = 143.85

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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.