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Finding the Fourth Proportional to 120,039.92, 165,650.64 and 66,323.78

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Solution

The fourth proportional to 120,039.92, 165,650.64 and 66,323.78 is: 91,524.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,039.92 : 165,650.64 = 66,323.78 : x
  2. Step 2: Convert to fraction form
    120,039.92/165,650.64 = 66,323.78/x
  3. Step 3: Cross multiply
    120,039.92x = 165,650.64 × 66,323.78
  4. Step 4: Simplify right side
    120,039.92x = 10,986,576,604.22
  5. Step 5: Solve for x
    x = 10,986,576,604.22/120,039.92
  6. Step 6: Final answer
    x = 91,524.36

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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.