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Finding the Fourth Proportional to 81,859.60, 122,616.60 and 68,035.60

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Solution

The fourth proportional to 81,859.60, 122,616.60 and 68,035.60 is: 101,909.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,859.60 : 122,616.60 = 68,035.60 : x
  2. Step 2: Convert to fraction form
    81,859.60/122,616.60 = 68,035.60/x
  3. Step 3: Cross multiply
    81,859.60x = 122,616.60 × 68,035.60
  4. Step 4: Simplify right side
    81,859.60x = 8,342,293,950.96
  5. Step 5: Solve for x
    x = 8,342,293,950.96/81,859.60
  6. Step 6: Final answer
    x = 101,909.78

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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.