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Finding the Fourth Proportional to 279,372.79, 419,073.02 and 79,722.59

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Solution

The fourth proportional to 279,372.79, 419,073.02 and 79,722.59 is: 119,587.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,372.79 : 419,073.02 = 79,722.59 : x
  2. Step 2: Convert to fraction form
    279,372.79/419,073.02 = 79,722.59/x
  3. Step 3: Cross multiply
    279,372.79x = 419,073.02 × 79,722.59
  4. Step 4: Simplify right side
    279,372.79x = 33,409,586,154.91
  5. Step 5: Solve for x
    x = 33,409,586,154.91/279,372.79
  6. Step 6: Final answer
    x = 119,587.83

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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.