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Finding the Fourth Proportional to 138.27, 191.01 and 107.26

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Solution

The fourth proportional to 138.27, 191.01 and 107.26 is: 148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.27 : 191.01 = 107.26 : x
  2. Step 2: Convert to fraction form
    138.27/191.01 = 107.26/x
  3. Step 3: Cross multiply
    138.27x = 191.01 × 107.26
  4. Step 4: Simplify right side
    138.27x = 20,487.73
  5. Step 5: Solve for x
    x = 20,487.73/138.27
  6. Step 6: Final answer
    x = 148.17

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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.