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Finding the Fourth Proportional to 68,363.20, 102,544.80 and 21,620.80

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Solution

The fourth proportional to 68,363.20, 102,544.80 and 21,620.80 is: 32,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,363.20 : 102,544.80 = 21,620.80 : x
  2. Step 2: Convert to fraction form
    68,363.20/102,544.80 = 21,620.80/x
  3. Step 3: Cross multiply
    68,363.20x = 102,544.80 × 21,620.80
  4. Step 4: Simplify right side
    68,363.20x = 2,217,100,611.84
  5. Step 5: Solve for x
    x = 2,217,100,611.84/68,363.20
  6. Step 6: Final answer
    x = 32,431.20

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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.