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Finding the Fourth Proportional to 172,486.92, 258,443.31 and 60,105.20

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Solution

The fourth proportional to 172,486.92, 258,443.31 and 60,105.20 is: 90,057.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,486.92 : 258,443.31 = 60,105.20 : x
  2. Step 2: Convert to fraction form
    172,486.92/258,443.31 = 60,105.20/x
  3. Step 3: Cross multiply
    172,486.92x = 258,443.31 × 60,105.20
  4. Step 4: Simplify right side
    172,486.92x = 15,533,785,544.00
  5. Step 5: Solve for x
    x = 15,533,785,544.00/172,486.92
  6. Step 6: Final answer
    x = 90,057.76

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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.