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Finding the Fourth Proportional to 126.41, 188.60 and 122.70

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Solution

The fourth proportional to 126.41, 188.60 and 122.70 is: 183.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.41 : 188.60 = 122.70 : x
  2. Step 2: Convert to fraction form
    126.41/188.60 = 122.70/x
  3. Step 3: Cross multiply
    126.41x = 188.60 × 122.70
  4. Step 4: Simplify right side
    126.41x = 23,141.31
  5. Step 5: Solve for x
    x = 23,141.31/126.41
  6. Step 6: Final answer
    x = 183.07

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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.