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Finding the Fourth Proportional to 68,358.39, 94,319.43 and 39,661.41

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Solution

The fourth proportional to 68,358.39, 94,319.43 and 39,661.41 is: 54,723.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,358.39 : 94,319.43 = 39,661.41 : x
  2. Step 2: Convert to fraction form
    68,358.39/94,319.43 = 39,661.41/x
  3. Step 3: Cross multiply
    68,358.39x = 94,319.43 × 39,661.41
  4. Step 4: Simplify right side
    68,358.39x = 3,740,841,584.20
  5. Step 5: Solve for x
    x = 3,740,841,584.20/68,358.39
  6. Step 6: Final answer
    x = 54,723.96

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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.