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Finding the Fourth Proportional to 109,708.80, 164,563.20 and 82,060.80

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Solution

The fourth proportional to 109,708.80, 164,563.20 and 82,060.80 is: 123,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,708.80 : 164,563.20 = 82,060.80 : x
  2. Step 2: Convert to fraction form
    109,708.80/164,563.20 = 82,060.80/x
  3. Step 3: Cross multiply
    109,708.80x = 164,563.20 × 82,060.80
  4. Step 4: Simplify right side
    109,708.80x = 13,504,187,842.56
  5. Step 5: Solve for x
    x = 13,504,187,842.56/109,708.80
  6. Step 6: Final answer
    x = 123,091.20

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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.