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Finding the Fourth Proportional to 78,794.85, 108,694.80 and 53,267.70

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Solution

The fourth proportional to 78,794.85, 108,694.80 and 53,267.70 is: 73,480.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,794.85 : 108,694.80 = 53,267.70 : x
  2. Step 2: Convert to fraction form
    78,794.85/108,694.80 = 53,267.70/x
  3. Step 3: Cross multiply
    78,794.85x = 108,694.80 × 53,267.70
  4. Step 4: Simplify right side
    78,794.85x = 5,789,921,997.96
  5. Step 5: Solve for x
    x = 5,789,921,997.96/78,794.85
  6. Step 6: Final answer
    x = 73,480.97

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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.