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Finding the Fourth Proportional to 261,626.20, 392,439.30 and 112,035.40

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Solution

The fourth proportional to 261,626.20, 392,439.30 and 112,035.40 is: 168,053.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,626.20 : 392,439.30 = 112,035.40 : x
  2. Step 2: Convert to fraction form
    261,626.20/392,439.30 = 112,035.40/x
  3. Step 3: Cross multiply
    261,626.20x = 392,439.30 × 112,035.40
  4. Step 4: Simplify right side
    261,626.20x = 43,967,093,951.22
  5. Step 5: Solve for x
    x = 43,967,093,951.22/261,626.20
  6. Step 6: Final answer
    x = 168,053.10

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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.