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Finding the Fourth Proportional to 71,787.53, 99,067.73 and 39,525.90

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Solution

The fourth proportional to 71,787.53, 99,067.73 and 39,525.90 is: 54,546.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,787.53 : 99,067.73 = 39,525.90 : x
  2. Step 2: Convert to fraction form
    71,787.53/99,067.73 = 39,525.90/x
  3. Step 3: Cross multiply
    71,787.53x = 99,067.73 × 39,525.90
  4. Step 4: Simplify right side
    71,787.53x = 3,915,741,189.21
  5. Step 5: Solve for x
    x = 3,915,741,189.21/71,787.53
  6. Step 6: Final answer
    x = 54,546.26

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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.