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Finding the Fourth Proportional to 192,789.68, 289,100.61 and 91,617.08

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Solution

The fourth proportional to 192,789.68, 289,100.61 and 91,617.08 is: 137,385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,789.68 : 289,100.61 = 91,617.08 : x
  2. Step 2: Convert to fraction form
    192,789.68/289,100.61 = 91,617.08/x
  3. Step 3: Cross multiply
    192,789.68x = 289,100.61 × 91,617.08
  4. Step 4: Simplify right side
    192,789.68x = 26,486,553,714.42
  5. Step 5: Solve for x
    x = 26,486,553,714.42/192,789.68
  6. Step 6: Final answer
    x = 137,385.74

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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.