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Finding the Fourth Proportional to 68,791.80, 94,932.61 and 40,112.63

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Solution

The fourth proportional to 68,791.80, 94,932.61 and 40,112.63 is: 55,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,791.80 : 94,932.61 = 40,112.63 : x
  2. Step 2: Convert to fraction form
    68,791.80/94,932.61 = 40,112.63/x
  3. Step 3: Cross multiply
    68,791.80x = 94,932.61 × 40,112.63
  4. Step 4: Simplify right side
    68,791.80x = 3,807,996,974.91
  5. Step 5: Solve for x
    x = 3,807,996,974.91/68,791.80
  6. Step 6: Final answer
    x = 55,355.39

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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.