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Finding the Fourth Proportional to 79,311.75, 109,469.37 and 53,860.60

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Solution

The fourth proportional to 79,311.75, 109,469.37 and 53,860.60 is: 74,340.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311.75 : 109,469.37 = 53,860.60 : x
  2. Step 2: Convert to fraction form
    79,311.75/109,469.37 = 53,860.60/x
  3. Step 3: Cross multiply
    79,311.75x = 109,469.37 × 53,860.60
  4. Step 4: Simplify right side
    79,311.75x = 5,896,085,949.82
  5. Step 5: Solve for x
    x = 5,896,085,949.82/79,311.75
  6. Step 6: Final answer
    x = 74,340.64

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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.