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Finding the Fourth Proportional to 120,936.58, 166,892.59 and 66,489.67

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Solution

The fourth proportional to 120,936.58, 166,892.59 and 66,489.67 is: 91,755.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,936.58 : 166,892.59 = 66,489.67 : x
  2. Step 2: Convert to fraction form
    120,936.58/166,892.59 = 66,489.67/x
  3. Step 3: Cross multiply
    120,936.58x = 166,892.59 × 66,489.67
  4. Step 4: Simplify right side
    120,936.58x = 11,096,632,902.10
  5. Step 5: Solve for x
    x = 11,096,632,902.10/120,936.58
  6. Step 6: Final answer
    x = 91,755.80

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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.