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Finding the Fourth Proportional to 120,991.50, 166,958.73 and 67,273.20

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Solution

The fourth proportional to 120,991.50, 166,958.73 and 67,273.20 is: 92,831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.50 : 166,958.73 = 67,273.20 : x
  2. Step 2: Convert to fraction form
    120,991.50/166,958.73 = 67,273.20/x
  3. Step 3: Cross multiply
    120,991.50x = 166,958.73 × 67,273.20
  4. Step 4: Simplify right side
    120,991.50x = 11,231,848,035.04
  5. Step 5: Solve for x
    x = 11,231,848,035.04/120,991.50
  6. Step 6: Final answer
    x = 92,831.71

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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.