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Finding the Fourth Proportional to 203,910.60, 305,865.90 and 133,051.80

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Solution

The fourth proportional to 203,910.60, 305,865.90 and 133,051.80 is: 199,577.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,910.60 : 305,865.90 = 133,051.80 : x
  2. Step 2: Convert to fraction form
    203,910.60/305,865.90 = 133,051.80/x
  3. Step 3: Cross multiply
    203,910.60x = 305,865.90 × 133,051.80
  4. Step 4: Simplify right side
    203,910.60x = 40,696,008,553.62
  5. Step 5: Solve for x
    x = 40,696,008,553.62/203,910.60
  6. Step 6: Final answer
    x = 199,577.70

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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.