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Finding the Fourth Proportional to 68,553.20, 102,829.80 and 21,810.80

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Solution

The fourth proportional to 68,553.20, 102,829.80 and 21,810.80 is: 32,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,553.20 : 102,829.80 = 21,810.80 : x
  2. Step 2: Convert to fraction form
    68,553.20/102,829.80 = 21,810.80/x
  3. Step 3: Cross multiply
    68,553.20x = 102,829.80 × 21,810.80
  4. Step 4: Simplify right side
    68,553.20x = 2,242,800,201.84
  5. Step 5: Solve for x
    x = 2,242,800,201.84/68,553.20
  6. Step 6: Final answer
    x = 32,716.20

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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.