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Finding the Fourth Proportional to 204,481.90, 307,050.90 and 138,215.80

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Solution

The fourth proportional to 204,481.90, 307,050.90 and 138,215.80 is: 207,545.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,481.90 : 307,050.90 = 138,215.80 : x
  2. Step 2: Convert to fraction form
    204,481.90/307,050.90 = 138,215.80/x
  3. Step 3: Cross multiply
    204,481.90x = 307,050.90 × 138,215.80
  4. Step 4: Simplify right side
    204,481.90x = 42,439,285,784.22
  5. Step 5: Solve for x
    x = 42,439,285,784.22/204,481.90
  6. Step 6: Final answer
    x = 207,545.44

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1.5x scale

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.