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Finding the Fourth Proportional to 204,018.80, 305,918.85 and 85,556.30

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Solution

The fourth proportional to 204,018.80, 305,918.85 and 85,556.30 is: 128,288.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,018.80 : 305,918.85 = 85,556.30 : x
  2. Step 2: Convert to fraction form
    204,018.80/305,918.85 = 85,556.30/x
  3. Step 3: Cross multiply
    204,018.80x = 305,918.85 × 85,556.30
  4. Step 4: Simplify right side
    204,018.80x = 26,173,284,906.26
  5. Step 5: Solve for x
    x = 26,173,284,906.26/204,018.80
  6. Step 6: Final answer
    x = 128,288.59

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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.