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Finding the Fourth Proportional to 120,571.92, 166,395.90 and 66,855.80

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Solution

The fourth proportional to 120,571.92, 166,395.90 and 66,855.80 is: 92,264.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,571.92 : 166,395.90 = 66,855.80 : x
  2. Step 2: Convert to fraction form
    120,571.92/166,395.90 = 66,855.80/x
  3. Step 3: Cross multiply
    120,571.92x = 166,395.90 × 66,855.80
  4. Step 4: Simplify right side
    120,571.92x = 11,124,530,179.24
  5. Step 5: Solve for x
    x = 11,124,530,179.24/120,571.92
  6. Step 6: Final answer
    x = 92,264.68

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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.