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Finding the Fourth Proportional to 393,912.65, 590,889.90 and 124,061.90

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Solution

The fourth proportional to 393,912.65, 590,889.90 and 124,061.90 is: 186,099.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,912.65 : 590,889.90 = 124,061.90 : x
  2. Step 2: Convert to fraction form
    393,912.65/590,889.90 = 124,061.90/x
  3. Step 3: Cross multiply
    393,912.65x = 590,889.90 × 124,061.90
  4. Step 4: Simplify right side
    393,912.65x = 73,306,921,195.59
  5. Step 5: Solve for x
    x = 73,306,921,195.59/393,912.65
  6. Step 6: Final answer
    x = 186,099.43

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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.