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Finding the Fourth Proportional to 203,789.88, 305,586.54 and 85,429.48

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Solution

The fourth proportional to 203,789.88, 305,586.54 and 85,429.48 is: 128,103.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,789.88 : 305,586.54 = 85,429.48 : x
  2. Step 2: Convert to fraction form
    203,789.88/305,586.54 = 85,429.48/x
  3. Step 3: Cross multiply
    203,789.88x = 305,586.54 × 85,429.48
  4. Step 4: Simplify right side
    203,789.88x = 26,106,099,207.20
  5. Step 5: Solve for x
    x = 26,106,099,207.20/203,789.88
  6. Step 6: Final answer
    x = 128,103.02

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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.