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Finding the Fourth Proportional to 120,481.88, 166,268.63 and 66,761.87

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Solution

The fourth proportional to 120,481.88, 166,268.63 and 66,761.87 is: 92,133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,481.88 : 166,268.63 = 66,761.87 : x
  2. Step 2: Convert to fraction form
    120,481.88/166,268.63 = 66,761.87/x
  3. Step 3: Cross multiply
    120,481.88x = 166,268.63 × 66,761.87
  4. Step 4: Simplify right side
    120,481.88x = 11,100,404,661.14
  5. Step 5: Solve for x
    x = 11,100,404,661.14/120,481.88
  6. Step 6: Final answer
    x = 92,133.40

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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.