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Finding the Fourth Proportional to 126.87, 188.87 and 126.19

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Solution

The fourth proportional to 126.87, 188.87 and 126.19 is: 187.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.87 : 188.87 = 126.19 : x
  2. Step 2: Convert to fraction form
    126.87/188.87 = 126.19/x
  3. Step 3: Cross multiply
    126.87x = 188.87 × 126.19
  4. Step 4: Simplify right side
    126.87x = 23,831.93
  5. Step 5: Solve for x
    x = 23,831.93/126.87
  6. Step 6: Final answer
    x = 187.85

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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.