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Finding the Fourth Proportional to 99,340.57, 137,450.98 and 86,620.26

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Solution

The fourth proportional to 99,340.57, 137,450.98 and 86,620.26 is: 119,850.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,340.57 : 137,450.98 = 86,620.26 : x
  2. Step 2: Convert to fraction form
    99,340.57/137,450.98 = 86,620.26/x
  3. Step 3: Cross multiply
    99,340.57x = 137,450.98 × 86,620.26
  4. Step 4: Simplify right side
    99,340.57x = 11,906,039,497.78
  5. Step 5: Solve for x
    x = 11,906,039,497.78/99,340.57
  6. Step 6: Final answer
    x = 119,850.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.