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Finding the Fourth Proportional to 79,609.64, 109,786.74 and 49,399.88

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Solution

The fourth proportional to 79,609.64, 109,786.74 and 49,399.88 is: 68,125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,609.64 : 109,786.74 = 49,399.88 : x
  2. Step 2: Convert to fraction form
    79,609.64/109,786.74 = 49,399.88/x
  3. Step 3: Cross multiply
    79,609.64x = 109,786.74 × 49,399.88
  4. Step 4: Simplify right side
    79,609.64x = 5,423,451,781.59
  5. Step 5: Solve for x
    x = 5,423,451,781.59/79,609.64
  6. Step 6: Final answer
    x = 68,125.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.