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Finding the Fourth Proportional to 239,910, 331,104.96 and 139,308

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Solution

The fourth proportional to 239,910, 331,104.96 and 139,308 is: 192,261.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,910 : 331,104.96 = 139,308 : x
  2. Step 2: Convert to fraction form
    239,910/331,104.96 = 139,308/x
  3. Step 3: Cross multiply
    239,910x = 331,104.96 × 139,308
  4. Step 4: Simplify right side
    239,910x = 46,125,569,767.68
  5. Step 5: Solve for x
    x = 46,125,569,767.68/239,910
  6. Step 6: Final answer
    x = 192,261.97

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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.