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Finding the Fourth Proportional to 204,958.01, 307,363.21 and 86,638.55

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Solution

The fourth proportional to 204,958.01, 307,363.21 and 86,638.55 is: 129,926.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,958.01 : 307,363.21 = 86,638.55 : x
  2. Step 2: Convert to fraction form
    204,958.01/307,363.21 = 86,638.55/x
  3. Step 3: Cross multiply
    204,958.01x = 307,363.21 × 86,638.55
  4. Step 4: Simplify right side
    204,958.01x = 26,629,501,084.33
  5. Step 5: Solve for x
    x = 26,629,501,084.33/204,958.01
  6. Step 6: Final answer
    x = 129,926.62

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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.