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Finding the Fourth Proportional to 120,571.62, 166,388.53 and 66,855.25

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Solution

The fourth proportional to 120,571.62, 166,388.53 and 66,855.25 is: 92,260.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,571.62 : 166,388.53 = 66,855.25 : x
  2. Step 2: Convert to fraction form
    120,571.62/166,388.53 = 66,855.25/x
  3. Step 3: Cross multiply
    120,571.62x = 166,388.53 × 66,855.25
  4. Step 4: Simplify right side
    120,571.62x = 11,123,946,770.28
  5. Step 5: Solve for x
    x = 11,123,946,770.28/120,571.62
  6. Step 6: Final answer
    x = 92,260.08

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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.