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Finding the Fourth Proportional to 68,665.20, 103,053.67 and 35,394.78

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Solution

The fourth proportional to 68,665.20, 103,053.67 and 35,394.78 is: 53,120.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,665.20 : 103,053.67 = 35,394.78 : x
  2. Step 2: Convert to fraction form
    68,665.20/103,053.67 = 35,394.78/x
  3. Step 3: Cross multiply
    68,665.20x = 103,053.67 × 35,394.78
  4. Step 4: Simplify right side
    68,665.20x = 3,647,561,977.84
  5. Step 5: Solve for x
    x = 3,647,561,977.84/68,665.20
  6. Step 6: Final answer
    x = 53,120.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.