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Finding the Fourth Proportional to 68,169.39, 94,072.64 and 39,879.87

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Solution

The fourth proportional to 68,169.39, 94,072.64 and 39,879.87 is: 55,033.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,169.39 : 94,072.64 = 39,879.87 : x
  2. Step 2: Convert to fraction form
    68,169.39/94,072.64 = 39,879.87/x
  3. Step 3: Cross multiply
    68,169.39x = 94,072.64 × 39,879.87
  4. Step 4: Simplify right side
    68,169.39x = 3,751,604,454.36
  5. Step 5: Solve for x
    x = 3,751,604,454.36/68,169.39
  6. Step 6: Final answer
    x = 55,033.56

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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.