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Finding the Fourth Proportional to 80,611.98, 120,917.78 and 21,447.66

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Solution

The fourth proportional to 80,611.98, 120,917.78 and 21,447.66 is: 32,171.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,611.98 : 120,917.78 = 21,447.66 : x
  2. Step 2: Convert to fraction form
    80,611.98/120,917.78 = 21,447.66/x
  3. Step 3: Cross multiply
    80,611.98x = 120,917.78 × 21,447.66
  4. Step 4: Simplify right side
    80,611.98x = 2,593,403,433.39
  5. Step 5: Solve for x
    x = 2,593,403,433.39/80,611.98
  6. Step 6: Final answer
    x = 32,171.44

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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.