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Finding the Fourth Proportional to 126.76, 189.05 and 124.60

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Solution

The fourth proportional to 126.76, 189.05 and 124.60 is: 185.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.76 : 189.05 = 124.60 : x
  2. Step 2: Convert to fraction form
    126.76/189.05 = 124.60/x
  3. Step 3: Cross multiply
    126.76x = 189.05 × 124.60
  4. Step 4: Simplify right side
    126.76x = 23,555.63
  5. Step 5: Solve for x
    x = 23,555.63/126.76
  6. Step 6: Final answer
    x = 185.83

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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.