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Finding the Fourth Proportional to 203,489.80, 305,024.10 and 91,223.80

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Solution

The fourth proportional to 203,489.80, 305,024.10 and 91,223.80 is: 136,741.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,489.80 : 305,024.10 = 91,223.80 : x
  2. Step 2: Convert to fraction form
    203,489.80/305,024.10 = 91,223.80/x
  3. Step 3: Cross multiply
    203,489.80x = 305,024.10 × 91,223.80
  4. Step 4: Simplify right side
    203,489.80x = 27,825,457,493.58
  5. Step 5: Solve for x
    x = 27,825,457,493.58/203,489.80
  6. Step 6: Final answer
    x = 136,741.29

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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.