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Finding the Fourth Proportional to 279,971.77, 419,957.97 and 69,609.73

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Solution

The fourth proportional to 279,971.77, 419,957.97 and 69,609.73 is: 104,414.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,971.77 : 419,957.97 = 69,609.73 : x
  2. Step 2: Convert to fraction form
    279,971.77/419,957.97 = 69,609.73/x
  3. Step 3: Cross multiply
    279,971.77x = 419,957.97 × 69,609.73
  4. Step 4: Simplify right side
    279,971.77x = 29,233,160,903.05
  5. Step 5: Solve for x
    x = 29,233,160,903.05/279,971.77
  6. Step 6: Final answer
    x = 104,414.67

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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.