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Finding the Fourth Proportional to 68,563.80, 102,845.52 and 21,816.54

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Solution

The fourth proportional to 68,563.80, 102,845.52 and 21,816.54 is: 32,724.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,563.80 : 102,845.52 = 21,816.54 : x
  2. Step 2: Convert to fraction form
    68,563.80/102,845.52 = 21,816.54/x
  3. Step 3: Cross multiply
    68,563.80x = 102,845.52 × 21,816.54
  4. Step 4: Simplify right side
    68,563.80x = 2,243,733,400.90
  5. Step 5: Solve for x
    x = 2,243,733,400.90/68,563.80
  6. Step 6: Final answer
    x = 32,724.75

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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.