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Finding the Fourth Proportional to 192,908.60, 289,319.70 and 126,812.60

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Solution

The fourth proportional to 192,908.60, 289,319.70 and 126,812.60 is: 190,190.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,908.60 : 289,319.70 = 126,812.60 : x
  2. Step 2: Convert to fraction form
    192,908.60/289,319.70 = 126,812.60/x
  3. Step 3: Cross multiply
    192,908.60x = 289,319.70 × 126,812.60
  4. Step 4: Simplify right side
    192,908.60x = 36,689,383,388.22
  5. Step 5: Solve for x
    x = 36,689,383,388.22/192,908.60
  6. Step 6: Final answer
    x = 190,190.50

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1.5x scale

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.