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Finding the Fourth Proportional to 118,758.92, 163,889.16 and 65,042.96

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Solution

The fourth proportional to 118,758.92, 163,889.16 and 65,042.96 is: 89,760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,758.92 : 163,889.16 = 65,042.96 : x
  2. Step 2: Convert to fraction form
    118,758.92/163,889.16 = 65,042.96/x
  3. Step 3: Cross multiply
    118,758.92x = 163,889.16 × 65,042.96
  4. Step 4: Simplify right side
    118,758.92x = 10,659,836,078.31
  5. Step 5: Solve for x
    x = 10,659,836,078.31/118,758.92
  6. Step 6: Final answer
    x = 89,760.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.