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Finding the Fourth Proportional to 279,989.92, 419,986.50 and 69,627.88

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Solution

The fourth proportional to 279,989.92, 419,986.50 and 69,627.88 is: 104,442.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,989.92 : 419,986.50 = 69,627.88 : x
  2. Step 2: Convert to fraction form
    279,989.92/419,986.50 = 69,627.88/x
  3. Step 3: Cross multiply
    279,989.92x = 419,986.50 × 69,627.88
  4. Step 4: Simplify right side
    279,989.92x = 29,242,769,623.62
  5. Step 5: Solve for x
    x = 29,242,769,623.62/279,989.92
  6. Step 6: Final answer
    x = 104,442.22

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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.