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Finding the Fourth Proportional to 126.86, 189.06 and 122.76

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Solution

The fourth proportional to 126.86, 189.06 and 122.76 is: 182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.86 : 189.06 = 122.76 : x
  2. Step 2: Convert to fraction form
    126.86/189.06 = 122.76/x
  3. Step 3: Cross multiply
    126.86x = 189.06 × 122.76
  4. Step 4: Simplify right side
    126.86x = 23,208.97
  5. Step 5: Solve for x
    x = 23,208.97/126.86
  6. Step 6: Final answer
    x = 182.95

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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.