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Finding the Fourth Proportional to 68,744.40, 103,116.60 and 61,227.60

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Solution

The fourth proportional to 68,744.40, 103,116.60 and 61,227.60 is: 91,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,744.40 : 103,116.60 = 61,227.60 : x
  2. Step 2: Convert to fraction form
    68,744.40/103,116.60 = 61,227.60/x
  3. Step 3: Cross multiply
    68,744.40x = 103,116.60 × 61,227.60
  4. Step 4: Simplify right side
    68,744.40x = 6,313,581,938.16
  5. Step 5: Solve for x
    x = 6,313,581,938.16/68,744.40
  6. Step 6: Final answer
    x = 91,841.40

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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.