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Finding the Fourth Proportional to 74,604.60, 111,968.10 and 74,021.40

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Solution

The fourth proportional to 74,604.60, 111,968.10 and 74,021.40 is: 111,092.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,604.60 : 111,968.10 = 74,021.40 : x
  2. Step 2: Convert to fraction form
    74,604.60/111,968.10 = 74,021.40/x
  3. Step 3: Cross multiply
    74,604.60x = 111,968.10 × 74,021.40
  4. Step 4: Simplify right side
    74,604.60x = 8,288,035,517.34
  5. Step 5: Solve for x
    x = 8,288,035,517.34/74,604.60
  6. Step 6: Final answer
    x = 111,092.82

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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.