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Finding the Fourth Proportional to 126.06, 188.18 and 109.05

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Solution

The fourth proportional to 126.06, 188.18 and 109.05 is: 162.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.06 : 188.18 = 109.05 : x
  2. Step 2: Convert to fraction form
    126.06/188.18 = 109.05/x
  3. Step 3: Cross multiply
    126.06x = 188.18 × 109.05
  4. Step 4: Simplify right side
    126.06x = 20,520.48
  5. Step 5: Solve for x
    x = 20,520.48/126.06
  6. Step 6: Final answer
    x = 162.78

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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.