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Finding the Fourth Proportional to 279,342.56, 419,017.69 and 79,662.97

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Solution

The fourth proportional to 279,342.56, 419,017.69 and 79,662.97 is: 119,495.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,342.56 : 419,017.69 = 79,662.97 : x
  2. Step 2: Convert to fraction form
    279,342.56/419,017.69 = 79,662.97/x
  3. Step 3: Cross multiply
    279,342.56x = 419,017.69 × 79,662.97
  4. Step 4: Simplify right side
    279,342.56x = 33,380,192,421.24
  5. Step 5: Solve for x
    x = 33,380,192,421.24/279,342.56
  6. Step 6: Final answer
    x = 119,495.55

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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.