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Finding the Fourth Proportional to 239,907, 331,100.82 and 139,305

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Solution

The fourth proportional to 239,907, 331,100.82 and 139,305 is: 192,257.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,907 : 331,100.82 = 139,305 : x
  2. Step 2: Convert to fraction form
    239,907/331,100.82 = 139,305/x
  3. Step 3: Cross multiply
    239,907x = 331,100.82 × 139,305
  4. Step 4: Simplify right side
    239,907x = 46,123,999,730.10
  5. Step 5: Solve for x
    x = 46,123,999,730.10/239,907
  6. Step 6: Final answer
    x = 192,257.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.