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Finding the Fourth Proportional to 120,336.92, 166,062.96 and 66,620.78

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Solution

The fourth proportional to 120,336.92, 166,062.96 and 66,620.78 is: 91,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,336.92 : 166,062.96 = 66,620.78 : x
  2. Step 2: Convert to fraction form
    120,336.92/166,062.96 = 66,620.78/x
  3. Step 3: Cross multiply
    120,336.92x = 166,062.96 × 66,620.78
  4. Step 4: Simplify right side
    120,336.92x = 11,063,243,924.31
  5. Step 5: Solve for x
    x = 11,063,243,924.31/120,336.92
  6. Step 6: Final answer
    x = 91,935.57

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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.