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Finding the Fourth Proportional to 154,067.70, 231,101.55 and 91,859.70

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Solution

The fourth proportional to 154,067.70, 231,101.55 and 91,859.70 is: 137,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,067.70 : 231,101.55 = 91,859.70 : x
  2. Step 2: Convert to fraction form
    154,067.70/231,101.55 = 91,859.70/x
  3. Step 3: Cross multiply
    154,067.70x = 231,101.55 × 91,859.70
  4. Step 4: Simplify right side
    154,067.70x = 21,228,919,052.54
  5. Step 5: Solve for x
    x = 21,228,919,052.54/154,067.70
  6. Step 6: Final answer
    x = 137,789.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.