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Finding the Fourth Proportional to 186,917.20, 280,440.60 and 81,811.60

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Solution

The fourth proportional to 186,917.20, 280,440.60 and 81,811.60 is: 122,745.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,917.20 : 280,440.60 = 81,811.60 : x
  2. Step 2: Convert to fraction form
    186,917.20/280,440.60 = 81,811.60/x
  3. Step 3: Cross multiply
    186,917.20x = 280,440.60 × 81,811.60
  4. Step 4: Simplify right side
    186,917.20x = 22,943,294,190.96
  5. Step 5: Solve for x
    x = 22,943,294,190.96/186,917.20
  6. Step 6: Final answer
    x = 122,745.76

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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.