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Finding the Fourth Proportional to 126.46, 188.87 and 108.22

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Solution

The fourth proportional to 126.46, 188.87 and 108.22 is: 161.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.46 : 188.87 = 108.22 : x
  2. Step 2: Convert to fraction form
    126.46/188.87 = 108.22/x
  3. Step 3: Cross multiply
    126.46x = 188.87 × 108.22
  4. Step 4: Simplify right side
    126.46x = 20,439.51
  5. Step 5: Solve for x
    x = 20,439.51/126.46
  6. Step 6: Final answer
    x = 161.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.