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Finding the Fourth Proportional to 67,811, 101,716.52 and 21,063.88

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Solution

The fourth proportional to 67,811, 101,716.52 and 21,063.88 is: 31,595.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,811 : 101,716.52 = 21,063.88 : x
  2. Step 2: Convert to fraction form
    67,811/101,716.52 = 21,063.88/x
  3. Step 3: Cross multiply
    67,811x = 101,716.52 × 21,063.88
  4. Step 4: Simplify right side
    67,811x = 2,142,544,571.30
  5. Step 5: Solve for x
    x = 2,142,544,571.30/67,811
  6. Step 6: Final answer
    x = 31,595.83

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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.