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Finding the Fourth Proportional to 120,786.49, 166,695.87 and 67,081.97

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Solution

The fourth proportional to 120,786.49, 166,695.87 and 67,081.97 is: 92,578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,786.49 : 166,695.87 = 67,081.97 : x
  2. Step 2: Convert to fraction form
    120,786.49/166,695.87 = 67,081.97/x
  3. Step 3: Cross multiply
    120,786.49x = 166,695.87 × 67,081.97
  4. Step 4: Simplify right side
    120,786.49x = 11,182,288,018.76
  5. Step 5: Solve for x
    x = 11,182,288,018.76/120,786.49
  6. Step 6: Final answer
    x = 92,578.96

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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.