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Finding the Fourth Proportional to 159,067.87, 219,517.85 and 87,449.69

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Solution

The fourth proportional to 159,067.87, 219,517.85 and 87,449.69 is: 120,682.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,067.87 : 219,517.85 = 87,449.69 : x
  2. Step 2: Convert to fraction form
    159,067.87/219,517.85 = 87,449.69/x
  3. Step 3: Cross multiply
    159,067.87x = 219,517.85 × 87,449.69
  4. Step 4: Simplify right side
    159,067.87x = 19,196,767,494.72
  5. Step 5: Solve for x
    x = 19,196,767,494.72/159,067.87
  6. Step 6: Final answer
    x = 120,682.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.