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Finding the Fourth Proportional to 69,213.80, 103,674.90 and 56,091.80

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Solution

The fourth proportional to 69,213.80, 103,674.90 and 56,091.80 is: 84,019.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,213.80 : 103,674.90 = 56,091.80 : x
  2. Step 2: Convert to fraction form
    69,213.80/103,674.90 = 56,091.80/x
  3. Step 3: Cross multiply
    69,213.80x = 103,674.90 × 56,091.80
  4. Step 4: Simplify right side
    69,213.80x = 5,815,311,755.82
  5. Step 5: Solve for x
    x = 5,815,311,755.82/69,213.80
  6. Step 6: Final answer
    x = 84,019.54

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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.