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Finding the Fourth Proportional to 73,163.10, 109,744.65 and 20,571.90

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Solution

The fourth proportional to 73,163.10, 109,744.65 and 20,571.90 is: 30,857.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,163.10 : 109,744.65 = 20,571.90 : x
  2. Step 2: Convert to fraction form
    73,163.10/109,744.65 = 20,571.90/x
  3. Step 3: Cross multiply
    73,163.10x = 109,744.65 × 20,571.90
  4. Step 4: Simplify right side
    73,163.10x = 2,257,655,965.34
  5. Step 5: Solve for x
    x = 2,257,655,965.34/73,163.10
  6. Step 6: Final answer
    x = 30,857.85

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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.