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Finding the Fourth Proportional to 120,909.78, 166,855.84 and 67,194.63

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Solution

The fourth proportional to 120,909.78, 166,855.84 and 67,194.63 is: 92,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,909.78 : 166,855.84 = 67,194.63 : x
  2. Step 2: Convert to fraction form
    120,909.78/166,855.84 = 67,194.63/x
  3. Step 3: Cross multiply
    120,909.78x = 166,855.84 × 67,194.63
  4. Step 4: Simplify right side
    120,909.78x = 11,211,816,432.14
  5. Step 5: Solve for x
    x = 11,211,816,432.14/120,909.78
  6. Step 6: Final answer
    x = 92,728.78

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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.