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Finding the Fourth Proportional to 126.99, 191.25 and 107.88

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Solution

The fourth proportional to 126.99, 191.25 and 107.88 is: 162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.99 : 191.25 = 107.88 : x
  2. Step 2: Convert to fraction form
    126.99/191.25 = 107.88/x
  3. Step 3: Cross multiply
    126.99x = 191.25 × 107.88
  4. Step 4: Simplify right side
    126.99x = 20,632.05
  5. Step 5: Solve for x
    x = 20,632.05/126.99
  6. Step 6: Final answer
    x = 162.47

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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.