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Finding the Fourth Proportional to 203,606.60, 305,604.30 and 103,879.40

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Solution

The fourth proportional to 203,606.60, 305,604.30 and 103,879.40 is: 155,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,606.60 : 305,604.30 = 103,879.40 : x
  2. Step 2: Convert to fraction form
    203,606.60/305,604.30 = 103,879.40/x
  3. Step 3: Cross multiply
    203,606.60x = 305,604.30 × 103,879.40
  4. Step 4: Simplify right side
    203,606.60x = 31,745,991,321.42
  5. Step 5: Solve for x
    x = 31,745,991,321.42/203,606.60
  6. Step 6: Final answer
    x = 155,918.28

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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.