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Finding the Fourth Proportional to 71,067.31, 98,072.60 and 39,235.97

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Solution

The fourth proportional to 71,067.31, 98,072.60 and 39,235.97 is: 54,145.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,067.31 : 98,072.60 = 39,235.97 : x
  2. Step 2: Convert to fraction form
    71,067.31/98,072.60 = 39,235.97/x
  3. Step 3: Cross multiply
    71,067.31x = 98,072.60 × 39,235.97
  4. Step 4: Simplify right side
    71,067.31x = 3,847,973,934.69
  5. Step 5: Solve for x
    x = 3,847,973,934.69/71,067.31
  6. Step 6: Final answer
    x = 54,145.49

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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.