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Finding the Fourth Proportional to 120,738.80, 166,620.65 and 67,028.92

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Solution

The fourth proportional to 120,738.80, 166,620.65 and 67,028.92 is: 92,500.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,738.80 : 166,620.65 = 67,028.92 : x
  2. Step 2: Convert to fraction form
    120,738.80/166,620.65 = 67,028.92/x
  3. Step 3: Cross multiply
    120,738.80x = 166,620.65 × 67,028.92
  4. Step 4: Simplify right side
    120,738.80x = 11,168,401,467.50
  5. Step 5: Solve for x
    x = 11,168,401,467.50/120,738.80
  6. Step 6: Final answer
    x = 92,500.52

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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.