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Finding the Fourth Proportional to 68,243.20, 102,379.20 and 21,500.80

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Solution

The fourth proportional to 68,243.20, 102,379.20 and 21,500.80 is: 32,255.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,243.20 : 102,379.20 = 21,500.80 : x
  2. Step 2: Convert to fraction form
    68,243.20/102,379.20 = 21,500.80/x
  3. Step 3: Cross multiply
    68,243.20x = 102,379.20 × 21,500.80
  4. Step 4: Simplify right side
    68,243.20x = 2,201,234,703.36
  5. Step 5: Solve for x
    x = 2,201,234,703.36/68,243.20
  6. Step 6: Final answer
    x = 32,255.74

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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.