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Finding the Fourth Proportional to 279,771.87, 386,073.09 and 158,912.79

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Solution

The fourth proportional to 279,771.87, 386,073.09 and 158,912.79 is: 219,292.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,771.87 : 386,073.09 = 158,912.79 : x
  2. Step 2: Convert to fraction form
    279,771.87/386,073.09 = 158,912.79/x
  3. Step 3: Cross multiply
    279,771.87x = 386,073.09 × 158,912.79
  4. Step 4: Simplify right side
    279,771.87x = 61,351,951,875.82
  5. Step 5: Solve for x
    x = 61,351,951,875.82/279,771.87
  6. Step 6: Final answer
    x = 219,292.78

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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.