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Finding the Fourth Proportional to 203,220.60, 305,003.70 and 91,073.40

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Solution

The fourth proportional to 203,220.60, 305,003.70 and 91,073.40 is: 136,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,220.60 : 305,003.70 = 91,073.40 : x
  2. Step 2: Convert to fraction form
    203,220.60/305,003.70 = 91,073.40/x
  3. Step 3: Cross multiply
    203,220.60x = 305,003.70 × 91,073.40
  4. Step 4: Simplify right side
    203,220.60x = 27,777,723,971.58
  5. Step 5: Solve for x
    x = 27,777,723,971.58/203,220.60
  6. Step 6: Final answer
    x = 136,687.54

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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.