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Finding the Fourth Proportional to 120,366.68, 166,103.99 and 66,650.55

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Solution

The fourth proportional to 120,366.68, 166,103.99 and 66,650.55 is: 91,976.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,366.68 : 166,103.99 = 66,650.55 : x
  2. Step 2: Convert to fraction form
    120,366.68/166,103.99 = 66,650.55/x
  3. Step 3: Cross multiply
    120,366.68x = 166,103.99 × 66,650.55
  4. Step 4: Simplify right side
    120,366.68x = 11,070,922,290.69
  5. Step 5: Solve for x
    x = 11,070,922,290.69/120,366.68
  6. Step 6: Final answer
    x = 91,976.64

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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.