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Finding the Fourth Proportional to 279,930.96, 419,894.88 and 69,568.80

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Solution

The fourth proportional to 279,930.96, 419,894.88 and 69,568.80 is: 104,352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,930.96 : 419,894.88 = 69,568.80 : x
  2. Step 2: Convert to fraction form
    279,930.96/419,894.88 = 69,568.80/x
  3. Step 3: Cross multiply
    279,930.96x = 419,894.88 × 69,568.80
  4. Step 4: Simplify right side
    279,930.96x = 29,211,582,927.74
  5. Step 5: Solve for x
    x = 29,211,582,927.74/279,930.96
  6. Step 6: Final answer
    x = 104,352.81

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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.