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Finding the Fourth Proportional to 171,998.57, 257,898.51 and 66,694.52

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Solution

The fourth proportional to 171,998.57, 257,898.51 and 66,694.52 is: 100,003.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,998.57 : 257,898.51 = 66,694.52 : x
  2. Step 2: Convert to fraction form
    171,998.57/257,898.51 = 66,694.52/x
  3. Step 3: Cross multiply
    171,998.57x = 257,898.51 × 66,694.52
  4. Step 4: Simplify right side
    171,998.57x = 17,200,417,977.91
  5. Step 5: Solve for x
    x = 17,200,417,977.91/171,998.57
  6. Step 6: Final answer
    x = 100,003.26

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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.