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Finding the Fourth Proportional to 126.07, 188.83 and 77.92

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Solution

The fourth proportional to 126.07, 188.83 and 77.92 is: 116.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.07 : 188.83 = 77.92 : x
  2. Step 2: Convert to fraction form
    126.07/188.83 = 77.92/x
  3. Step 3: Cross multiply
    126.07x = 188.83 × 77.92
  4. Step 4: Simplify right side
    126.07x = 14,713.63
  5. Step 5: Solve for x
    x = 14,713.63/126.07
  6. Step 6: Final answer
    x = 116.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.