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Finding the Fourth Proportional to 239,863, 331,040.12 and 139,261

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Solution

The fourth proportional to 239,863, 331,040.12 and 139,261 is: 192,197.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,863 : 331,040.12 = 139,261 : x
  2. Step 2: Convert to fraction form
    239,863/331,040.12 = 139,261/x
  3. Step 3: Cross multiply
    239,863x = 331,040.12 × 139,261
  4. Step 4: Simplify right side
    239,863x = 46,100,978,151.32
  5. Step 5: Solve for x
    x = 46,100,978,151.32/239,863
  6. Step 6: Final answer
    x = 192,197.12

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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.