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Finding the Fourth Proportional to 126.25, 188.06 and 120.43

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Solution

The fourth proportional to 126.25, 188.06 and 120.43 is: 179.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.25 : 188.06 = 120.43 : x
  2. Step 2: Convert to fraction form
    126.25/188.06 = 120.43/x
  3. Step 3: Cross multiply
    126.25x = 188.06 × 120.43
  4. Step 4: Simplify right side
    126.25x = 22,648.07
  5. Step 5: Solve for x
    x = 22,648.07/126.25
  6. Step 6: Final answer
    x = 179.39

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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.