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Finding the Fourth Proportional to 279,409.89, 419,118.68 and 79,730.22

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Solution

The fourth proportional to 279,409.89, 419,118.68 and 79,730.22 is: 119,596.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,409.89 : 419,118.68 = 79,730.22 : x
  2. Step 2: Convert to fraction form
    279,409.89/419,118.68 = 79,730.22/x
  3. Step 3: Cross multiply
    279,409.89x = 419,118.68 × 79,730.22
  4. Step 4: Simplify right side
    279,409.89x = 33,416,422,572.98
  5. Step 5: Solve for x
    x = 33,416,422,572.98/279,409.89
  6. Step 6: Final answer
    x = 119,596.42

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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.