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Finding the Fourth Proportional to 192,764.80, 289,091.60 and 66,399.92

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Solution

The fourth proportional to 192,764.80, 289,091.60 and 66,399.92 is: 99,580.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,764.80 : 289,091.60 = 66,399.92 : x
  2. Step 2: Convert to fraction form
    192,764.80/289,091.60 = 66,399.92/x
  3. Step 3: Cross multiply
    192,764.80x = 289,091.60 × 66,399.92
  4. Step 4: Simplify right side
    192,764.80x = 19,195,659,112.67
  5. Step 5: Solve for x
    x = 19,195,659,112.67/192,764.80
  6. Step 6: Final answer
    x = 99,580.73

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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.