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Finding the Fourth Proportional to 71,620.68, 98,833 and 39,791.40

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Solution

The fourth proportional to 71,620.68, 98,833 and 39,791.40 is: 54,910.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,620.68 : 98,833 = 39,791.40 : x
  2. Step 2: Convert to fraction form
    71,620.68/98,833 = 39,791.40/x
  3. Step 3: Cross multiply
    71,620.68x = 98,833 × 39,791.40
  4. Step 4: Simplify right side
    71,620.68x = 3,932,703,436.20
  5. Step 5: Solve for x
    x = 3,932,703,436.20/71,620.68
  6. Step 6: Final answer
    x = 54,910.17

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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.