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Finding the Fourth Proportional to 120,003.80, 179,919.30 and 67,429.40

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Solution

The fourth proportional to 120,003.80, 179,919.30 and 67,429.40 is: 101,095.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,003.80 : 179,919.30 = 67,429.40 : x
  2. Step 2: Convert to fraction form
    120,003.80/179,919.30 = 67,429.40/x
  3. Step 3: Cross multiply
    120,003.80x = 179,919.30 × 67,429.40
  4. Step 4: Simplify right side
    120,003.80x = 12,131,850,447.42
  5. Step 5: Solve for x
    x = 12,131,850,447.42/120,003.80
  6. Step 6: Final answer
    x = 101,095.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.