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Finding the Fourth Proportional to 279,147.98, 418,722.20 and 68,785.94

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Solution

The fourth proportional to 279,147.98, 418,722.20 and 68,785.94 is: 103,178.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,147.98 : 418,722.20 = 68,785.94 : x
  2. Step 2: Convert to fraction form
    279,147.98/418,722.20 = 68,785.94/x
  3. Step 3: Cross multiply
    279,147.98x = 418,722.20 × 68,785.94
  4. Step 4: Simplify right side
    279,147.98x = 28,802,200,125.87
  5. Step 5: Solve for x
    x = 28,802,200,125.87/279,147.98
  6. Step 6: Final answer
    x = 103,178.97

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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.