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Finding the Fourth Proportional to 120,736.70, 166,608.75 and 67,021.70

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Solution

The fourth proportional to 120,736.70, 166,608.75 and 67,021.70 is: 92,485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,736.70 : 166,608.75 = 67,021.70 : x
  2. Step 2: Convert to fraction form
    120,736.70/166,608.75 = 67,021.70/x
  3. Step 3: Cross multiply
    120,736.70x = 166,608.75 × 67,021.70
  4. Step 4: Simplify right side
    120,736.70x = 11,166,401,659.88
  5. Step 5: Solve for x
    x = 11,166,401,659.88/120,736.70
  6. Step 6: Final answer
    x = 92,485.56

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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.