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Finding the Fourth Proportional to 125.97, 173.79 and 82.31

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Solution

The fourth proportional to 125.97, 173.79 and 82.31 is: 113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.97 : 173.79 = 82.31 : x
  2. Step 2: Convert to fraction form
    125.97/173.79 = 82.31/x
  3. Step 3: Cross multiply
    125.97x = 173.79 × 82.31
  4. Step 4: Simplify right side
    125.97x = 14,303.79
  5. Step 5: Solve for x
    x = 14,303.79/125.97
  6. Step 6: Final answer
    x = 113.55

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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.