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Finding the Fourth Proportional to 186,912.06, 280,372.05 and 66,976.83

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Solution

The fourth proportional to 186,912.06, 280,372.05 and 66,976.83 is: 100,466.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,912.06 : 280,372.05 = 66,976.83 : x
  2. Step 2: Convert to fraction form
    186,912.06/280,372.05 = 66,976.83/x
  3. Step 3: Cross multiply
    186,912.06x = 280,372.05 × 66,976.83
  4. Step 4: Simplify right side
    186,912.06x = 18,778,431,129.60
  5. Step 5: Solve for x
    x = 18,778,431,129.60/186,912.06
  6. Step 6: Final answer
    x = 100,466.66

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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.