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Finding the Fourth Proportional to 120,480.90, 166,264.62 and 66,766.80

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Solution

The fourth proportional to 120,480.90, 166,264.62 and 66,766.80 is: 92,138.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,480.90 : 166,264.62 = 66,766.80 : x
  2. Step 2: Convert to fraction form
    120,480.90/166,264.62 = 66,766.80/x
  3. Step 3: Cross multiply
    120,480.90x = 166,264.62 × 66,766.80
  4. Step 4: Simplify right side
    120,480.90x = 11,100,956,630.62
  5. Step 5: Solve for x
    x = 11,100,956,630.62/120,480.90
  6. Step 6: Final answer
    x = 92,138.73

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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.