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Finding the Fourth Proportional to 239,860, 331,035.96 and 139,258

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Solution

The fourth proportional to 239,860, 331,035.96 and 139,258 is: 192,192.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,860 : 331,035.96 = 139,258 : x
  2. Step 2: Convert to fraction form
    239,860/331,035.96 = 139,258/x
  3. Step 3: Cross multiply
    239,860x = 331,035.96 × 139,258
  4. Step 4: Simplify right side
    239,860x = 46,099,405,717.68
  5. Step 5: Solve for x
    x = 46,099,405,717.68/239,860
  6. Step 6: Final answer
    x = 192,192.97

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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.