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Finding the Fourth Proportional to 81,771.19, 122,656.78 and 26,367.19

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Solution

The fourth proportional to 81,771.19, 122,656.78 and 26,367.19 is: 39,550.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,771.19 : 122,656.78 = 26,367.19 : x
  2. Step 2: Convert to fraction form
    81,771.19/122,656.78 = 26,367.19/x
  3. Step 3: Cross multiply
    81,771.19x = 122,656.78 × 26,367.19
  4. Step 4: Simplify right side
    81,771.19x = 3,234,114,349.37
  5. Step 5: Solve for x
    x = 3,234,114,349.37/81,771.19
  6. Step 6: Final answer
    x = 39,550.78

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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.