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Finding the Fourth Proportional to 68,811, 103,233.84 and 19,563

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Solution

The fourth proportional to 68,811, 103,233.84 and 19,563 is: 29,349.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811 : 103,233.84 = 19,563 : x
  2. Step 2: Convert to fraction form
    68,811/103,233.84 = 19,563/x
  3. Step 3: Cross multiply
    68,811x = 103,233.84 × 19,563
  4. Step 4: Simplify right side
    68,811x = 2,019,563,611.92
  5. Step 5: Solve for x
    x = 2,019,563,611.92/68,811
  6. Step 6: Final answer
    x = 29,349.43

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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.