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Finding the Fourth Proportional to 323,765.49, 485,531.60 and 136,791.57

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Solution

The fourth proportional to 323,765.49, 485,531.60 and 136,791.57 is: 205,138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,765.49 : 485,531.60 = 136,791.57 : x
  2. Step 2: Convert to fraction form
    323,765.49/485,531.60 = 136,791.57/x
  3. Step 3: Cross multiply
    323,765.49x = 485,531.60 × 136,791.57
  4. Step 4: Simplify right side
    323,765.49x = 66,416,629,164.65
  5. Step 5: Solve for x
    x = 66,416,629,164.65/323,765.49
  6. Step 6: Final answer
    x = 205,138.07

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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.