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Finding the Fourth Proportional to 68,812.85, 103,219.44 and 18,893.63

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Solution

The fourth proportional to 68,812.85, 103,219.44 and 18,893.63 is: 28,340.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,812.85 : 103,219.44 = 18,893.63 : x
  2. Step 2: Convert to fraction form
    68,812.85/103,219.44 = 18,893.63/x
  3. Step 3: Cross multiply
    68,812.85x = 103,219.44 × 18,893.63
  4. Step 4: Simplify right side
    68,812.85x = 1,950,189,813.70
  5. Step 5: Solve for x
    x = 1,950,189,813.70/68,812.85
  6. Step 6: Final answer
    x = 28,340.49

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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.