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Finding the Fourth Proportional to 87,360, 131,067.72 and 31,198.92

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Solution

The fourth proportional to 87,360, 131,067.72 and 31,198.92 is: 46,808.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,360 : 131,067.72 = 31,198.92 : x
  2. Step 2: Convert to fraction form
    87,360/131,067.72 = 31,198.92/x
  3. Step 3: Cross multiply
    87,360x = 131,067.72 × 31,198.92
  4. Step 4: Simplify right side
    87,360x = 4,089,171,310.86
  5. Step 5: Solve for x
    x = 4,089,171,310.86/87,360
  6. Step 6: Final answer
    x = 46,808.28

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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.