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Finding the Fourth Proportional to 120,786.32, 166,679.55 and 67,074.77

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Solution

The fourth proportional to 120,786.32, 166,679.55 and 67,074.77 is: 92,560.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,786.32 : 166,679.55 = 67,074.77 : x
  2. Step 2: Convert to fraction form
    120,786.32/166,679.55 = 67,074.77/x
  3. Step 3: Cross multiply
    120,786.32x = 166,679.55 × 67,074.77
  4. Step 4: Simplify right side
    120,786.32x = 11,179,991,646.56
  5. Step 5: Solve for x
    x = 11,179,991,646.56/120,786.32
  6. Step 6: Final answer
    x = 92,560.09

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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.