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Finding the Fourth Proportional to 192,911.60, 289,401.42 and 66,541.88

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Solution

The fourth proportional to 192,911.60, 289,401.42 and 66,541.88 is: 99,824.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,911.60 : 289,401.42 = 66,541.88 : x
  2. Step 2: Convert to fraction form
    192,911.60/289,401.42 = 66,541.88/x
  3. Step 3: Cross multiply
    192,911.60x = 289,401.42 × 66,541.88
  4. Step 4: Simplify right side
    192,911.60x = 19,257,314,561.47
  5. Step 5: Solve for x
    x = 19,257,314,561.47/192,911.60
  6. Step 6: Final answer
    x = 99,824.55

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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.