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Finding the Fourth Proportional to 68,382.45, 102,563.42 and 21,629.25

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Solution

The fourth proportional to 68,382.45, 102,563.42 and 21,629.25 is: 32,440.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,382.45 : 102,563.42 = 21,629.25 : x
  2. Step 2: Convert to fraction form
    68,382.45/102,563.42 = 21,629.25/x
  3. Step 3: Cross multiply
    68,382.45x = 102,563.42 × 21,629.25
  4. Step 4: Simplify right side
    68,382.45x = 2,218,369,743.89
  5. Step 5: Solve for x
    x = 2,218,369,743.89/68,382.45
  6. Step 6: Final answer
    x = 32,440.63

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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.