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Finding the Fourth Proportional to 87,305.31, 120,480.62 and 49,578.75

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Solution

The fourth proportional to 87,305.31, 120,480.62 and 49,578.75 is: 68,418.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,305.31 : 120,480.62 = 49,578.75 : x
  2. Step 2: Convert to fraction form
    87,305.31/120,480.62 = 49,578.75/x
  3. Step 3: Cross multiply
    87,305.31x = 120,480.62 × 49,578.75
  4. Step 4: Simplify right side
    87,305.31x = 5,973,278,290.93
  5. Step 5: Solve for x
    x = 5,973,278,290.93/87,305.31
  6. Step 6: Final answer
    x = 68,418.27

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1.5x scale

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.