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Finding the Fourth Proportional to 68,676.81, 94,735.29 and 39,993.09

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Solution

The fourth proportional to 68,676.81, 94,735.29 and 39,993.09 is: 55,167.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,676.81 : 94,735.29 = 39,993.09 : x
  2. Step 2: Convert to fraction form
    68,676.81/94,735.29 = 39,993.09/x
  3. Step 3: Cross multiply
    68,676.81x = 94,735.29 × 39,993.09
  4. Step 4: Simplify right side
    68,676.81x = 3,788,756,979.15
  5. Step 5: Solve for x
    x = 3,788,756,979.15/68,676.81
  6. Step 6: Final answer
    x = 55,167.92

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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.