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Finding the Fourth Proportional to 64,687.80, 96,991.86 and 25,198.92

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Solution

The fourth proportional to 64,687.80, 96,991.86 and 25,198.92 is: 37,782.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,687.80 : 96,991.86 = 25,198.92 : x
  2. Step 2: Convert to fraction form
    64,687.80/96,991.86 = 25,198.92/x
  3. Step 3: Cross multiply
    64,687.80x = 96,991.86 × 25,198.92
  4. Step 4: Simplify right side
    64,687.80x = 2,444,090,120.79
  5. Step 5: Solve for x
    x = 2,444,090,120.79/64,687.80
  6. Step 6: Final answer
    x = 37,782.86

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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.