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Finding the Fourth Proportional to 279,999.44, 420,134.31 and 137,767.58

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Solution

The fourth proportional to 279,999.44, 420,134.31 and 137,767.58 is: 206,717.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,999.44 : 420,134.31 = 137,767.58 : x
  2. Step 2: Convert to fraction form
    279,999.44/420,134.31 = 137,767.58/x
  3. Step 3: Cross multiply
    279,999.44x = 420,134.31 × 137,767.58
  4. Step 4: Simplify right side
    279,999.44x = 57,880,885,063.00
  5. Step 5: Solve for x
    x = 57,880,885,063.00/279,999.44
  6. Step 6: Final answer
    x = 206,717.86

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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.