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Finding the Fourth Proportional to 45,769.50, 68,652.19 and 12,489.45

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Solution

The fourth proportional to 45,769.50, 68,652.19 and 12,489.45 is: 18,733.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,769.50 : 68,652.19 = 12,489.45 : x
  2. Step 2: Convert to fraction form
    45,769.50/68,652.19 = 12,489.45/x
  3. Step 3: Cross multiply
    45,769.50x = 68,652.19 × 12,489.45
  4. Step 4: Simplify right side
    45,769.50x = 857,428,094.40
  5. Step 5: Solve for x
    x = 857,428,094.40/45,769.50
  6. Step 6: Final answer
    x = 18,733.61

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.