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Finding the Fourth Proportional to 138.44, 191.21 and 125.33

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Solution

The fourth proportional to 138.44, 191.21 and 125.33 is: 173.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.44 : 191.21 = 125.33 : x
  2. Step 2: Convert to fraction form
    138.44/191.21 = 125.33/x
  3. Step 3: Cross multiply
    138.44x = 191.21 × 125.33
  4. Step 4: Simplify right side
    138.44x = 23,962.77
  5. Step 5: Solve for x
    x = 23,962.77/138.44
  6. Step 6: Final answer
    x = 173.09

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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.