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Finding the Fourth Proportional to 120,321.92, 166,042.26 and 66,605.80

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Solution

The fourth proportional to 120,321.92, 166,042.26 and 66,605.80 is: 91,914.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,321.92 : 166,042.26 = 66,605.80 : x
  2. Step 2: Convert to fraction form
    120,321.92/166,042.26 = 66,605.80/x
  3. Step 3: Cross multiply
    120,321.92x = 166,042.26 × 66,605.80
  4. Step 4: Simplify right side
    120,321.92x = 11,059,377,561.11
  5. Step 5: Solve for x
    x = 11,059,377,561.11/120,321.92
  6. Step 6: Final answer
    x = 91,914.90

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1.5x scale

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.