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Finding the Fourth Proportional to 203,940.30, 305,910.45 and 154,173.90

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Solution

The fourth proportional to 203,940.30, 305,910.45 and 154,173.90 is: 231,260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,940.30 : 305,910.45 = 154,173.90 : x
  2. Step 2: Convert to fraction form
    203,940.30/305,910.45 = 154,173.90/x
  3. Step 3: Cross multiply
    203,940.30x = 305,910.45 × 154,173.90
  4. Step 4: Simplify right side
    203,940.30x = 47,163,407,127.26
  5. Step 5: Solve for x
    x = 47,163,407,127.26/203,940.30
  6. Step 6: Final answer
    x = 231,260.85

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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.