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Finding the Fourth Proportional to 161,665.91, 223,076.10 and 91,812.83

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Solution

The fourth proportional to 161,665.91, 223,076.10 and 91,812.83 is: 126,688.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,665.91 : 223,076.10 = 91,812.83 : x
  2. Step 2: Convert to fraction form
    161,665.91/223,076.10 = 91,812.83/x
  3. Step 3: Cross multiply
    161,665.91x = 223,076.10 × 91,812.83
  4. Step 4: Simplify right side
    161,665.91x = 20,481,248,046.36
  5. Step 5: Solve for x
    x = 20,481,248,046.36/161,665.91
  6. Step 6: Final answer
    x = 126,688.73

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1.5x scale

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.