Home / 279,905.44-420,020.76-117,787.56

Finding the Fourth Proportional to 279,905.44, 420,020.76 and 117,787.56

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Solution

The fourth proportional to 279,905.44, 420,020.76 and 117,787.56 is: 176,749.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,905.44 : 420,020.76 = 117,787.56 : x
  2. Step 2: Convert to fraction form
    279,905.44/420,020.76 = 117,787.56/x
  3. Step 3: Cross multiply
    279,905.44x = 420,020.76 × 117,787.56
  4. Step 4: Simplify right side
    279,905.44x = 49,473,220,469.75
  5. Step 5: Solve for x
    x = 49,473,220,469.75/279,905.44
  6. Step 6: Final answer
    x = 176,749.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.