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Finding the Fourth Proportional to 239,859, 331,034.58 and 139,257

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Solution

The fourth proportional to 239,859, 331,034.58 and 139,257 is: 192,191.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,859 : 331,034.58 = 139,257 : x
  2. Step 2: Convert to fraction form
    239,859/331,034.58 = 139,257/x
  3. Step 3: Cross multiply
    239,859x = 331,034.58 × 139,257
  4. Step 4: Simplify right side
    239,859x = 46,098,882,507.06
  5. Step 5: Solve for x
    x = 46,098,882,507.06/239,859
  6. Step 6: Final answer
    x = 192,191.59

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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.