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Finding the Fourth Proportional to 265,784.11, 398,685.58 and 66,105.54

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Solution

The fourth proportional to 265,784.11, 398,685.58 and 66,105.54 is: 99,160.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,784.11 : 398,685.58 = 66,105.54 : x
  2. Step 2: Convert to fraction form
    265,784.11/398,685.58 = 66,105.54/x
  3. Step 3: Cross multiply
    265,784.11x = 398,685.58 × 66,105.54
  4. Step 4: Simplify right side
    265,784.11x = 26,355,325,390.85
  5. Step 5: Solve for x
    x = 26,355,325,390.85/265,784.11
  6. Step 6: Final answer
    x = 99,160.65

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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.