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Finding the Fourth Proportional to 126.52, 188.49 and 117.20

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Solution

The fourth proportional to 126.52, 188.49 and 117.20 is: 174.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.52 : 188.49 = 117.20 : x
  2. Step 2: Convert to fraction form
    126.52/188.49 = 117.20/x
  3. Step 3: Cross multiply
    126.52x = 188.49 × 117.20
  4. Step 4: Simplify right side
    126.52x = 22,091.03
  5. Step 5: Solve for x
    x = 22,091.03/126.52
  6. Step 6: Final answer
    x = 174.61

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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.