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Finding the Fourth Proportional to 68,172.94, 102,260.49 and 20,789.02

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Solution

The fourth proportional to 68,172.94, 102,260.49 and 20,789.02 is: 31,183.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,172.94 : 102,260.49 = 20,789.02 : x
  2. Step 2: Convert to fraction form
    68,172.94/102,260.49 = 20,789.02/x
  3. Step 3: Cross multiply
    68,172.94x = 102,260.49 × 20,789.02
  4. Step 4: Simplify right side
    68,172.94x = 2,125,895,371.82
  5. Step 5: Solve for x
    x = 2,125,895,371.82/68,172.94
  6. Step 6: Final answer
    x = 31,183.86

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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.