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Finding the Fourth Proportional to 116,388.97, 174,239 and 71,872.59

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Solution

The fourth proportional to 116,388.97, 174,239 and 71,872.59 is: 107,596.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,388.97 : 174,239 = 71,872.59 : x
  2. Step 2: Convert to fraction form
    116,388.97/174,239 = 71,872.59/x
  3. Step 3: Cross multiply
    116,388.97x = 174,239 × 71,872.59
  4. Step 4: Simplify right side
    116,388.97x = 12,523,008,209.01
  5. Step 5: Solve for x
    x = 12,523,008,209.01/116,388.97
  6. Step 6: Final answer
    x = 107,596.18

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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.