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Finding the Fourth Proportional to 107.34, 149.31 and 105.36

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Solution

The fourth proportional to 107.34, 149.31 and 105.36 is: 146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.34 : 149.31 = 105.36 : x
  2. Step 2: Convert to fraction form
    107.34/149.31 = 105.36/x
  3. Step 3: Cross multiply
    107.34x = 149.31 × 105.36
  4. Step 4: Simplify right side
    107.34x = 15,731.30
  5. Step 5: Solve for x
    x = 15,731.30/107.34
  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.