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Finding the Fourth Proportional to 120,679.56, 166,529.79 and 66,961.17

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Solution

The fourth proportional to 120,679.56, 166,529.79 and 66,961.17 is: 92,401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,679.56 : 166,529.79 = 66,961.17 : x
  2. Step 2: Convert to fraction form
    120,679.56/166,529.79 = 66,961.17/x
  3. Step 3: Cross multiply
    120,679.56x = 166,529.79 × 66,961.17
  4. Step 4: Simplify right side
    120,679.56x = 11,151,029,578.25
  5. Step 5: Solve for x
    x = 11,151,029,578.25/120,679.56
  6. Step 6: Final answer
    x = 92,401.97

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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.