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Finding the Fourth Proportional to 71,391.74, 107,092.92 and 21,467.84

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Solution

The fourth proportional to 71,391.74, 107,092.92 and 21,467.84 is: 32,203.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.74 : 107,092.92 = 21,467.84 : x
  2. Step 2: Convert to fraction form
    71,391.74/107,092.92 = 21,467.84/x
  3. Step 3: Cross multiply
    71,391.74x = 107,092.92 × 21,467.84
  4. Step 4: Simplify right side
    71,391.74x = 2,299,053,671.69
  5. Step 5: Solve for x
    x = 2,299,053,671.69/71,391.74
  6. Step 6: Final answer
    x = 32,203.36

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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.