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Finding the Fourth Proportional to 126.84, 191.25 and 125.31

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Solution

The fourth proportional to 126.84, 191.25 and 125.31 is: 188.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.84 : 191.25 = 125.31 : x
  2. Step 2: Convert to fraction form
    126.84/191.25 = 125.31/x
  3. Step 3: Cross multiply
    126.84x = 191.25 × 125.31
  4. Step 4: Simplify right side
    126.84x = 23,965.54
  5. Step 5: Solve for x
    x = 23,965.54/126.84
  6. Step 6: Final answer
    x = 188.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.