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Finding the Fourth Proportional to 71,326.78, 106,983.97 and 43,238.56

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Solution

The fourth proportional to 71,326.78, 106,983.97 and 43,238.56 is: 64,854.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,326.78 : 106,983.97 = 43,238.56 : x
  2. Step 2: Convert to fraction form
    71,326.78/106,983.97 = 43,238.56/x
  3. Step 3: Cross multiply
    71,326.78x = 106,983.97 × 43,238.56
  4. Step 4: Simplify right side
    71,326.78x = 4,625,832,805.88
  5. Step 5: Solve for x
    x = 4,625,832,805.88/71,326.78
  6. Step 6: Final answer
    x = 64,854.08

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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.