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Finding the Fourth Proportional to 154.31, 213.03 and 125.55

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Solution

The fourth proportional to 154.31, 213.03 and 125.55 is: 173.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.31 : 213.03 = 125.55 : x
  2. Step 2: Convert to fraction form
    154.31/213.03 = 125.55/x
  3. Step 3: Cross multiply
    154.31x = 213.03 × 125.55
  4. Step 4: Simplify right side
    154.31x = 26,745.92
  5. Step 5: Solve for x
    x = 26,745.92/154.31
  6. Step 6: Final answer
    x = 173.33

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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.