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Finding the Fourth Proportional to 139,067.56, 206,812.28 and 134,638.92

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Solution

The fourth proportional to 139,067.56, 206,812.28 and 134,638.92 is: 200,226.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,067.56 : 206,812.28 = 134,638.92 : x
  2. Step 2: Convert to fraction form
    139,067.56/206,812.28 = 134,638.92/x
  3. Step 3: Cross multiply
    139,067.56x = 206,812.28 × 134,638.92
  4. Step 4: Simplify right side
    139,067.56x = 27,844,982,021.94
  5. Step 5: Solve for x
    x = 27,844,982,021.94/139,067.56
  6. Step 6: Final answer
    x = 200,226.29

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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.