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Finding the Fourth Proportional to 68,379.12, 94,359.96 and 39,694.32

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Solution

The fourth proportional to 68,379.12, 94,359.96 and 39,694.32 is: 54,776.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,379.12 : 94,359.96 = 39,694.32 : x
  2. Step 2: Convert to fraction form
    68,379.12/94,359.96 = 39,694.32/x
  3. Step 3: Cross multiply
    68,379.12x = 94,359.96 × 39,694.32
  4. Step 4: Simplify right side
    68,379.12x = 3,745,554,447.43
  5. Step 5: Solve for x
    x = 3,745,554,447.43/68,379.12
  6. Step 6: Final answer
    x = 54,776.29

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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.