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Finding the Fourth Proportional to 239,806.08, 331,059.28 and 154,971.54

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Solution

The fourth proportional to 239,806.08, 331,059.28 and 154,971.54 is: 213,942.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,806.08 : 331,059.28 = 154,971.54 : x
  2. Step 2: Convert to fraction form
    239,806.08/331,059.28 = 154,971.54/x
  3. Step 3: Cross multiply
    239,806.08x = 331,059.28 × 154,971.54
  4. Step 4: Simplify right side
    239,806.08x = 51,304,766,452.89
  5. Step 5: Solve for x
    x = 51,304,766,452.89/239,806.08
  6. Step 6: Final answer
    x = 213,942.73

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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.