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Finding the Fourth Proportional to 78,797.12, 108,708 and 50,519.36

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Solution

The fourth proportional to 78,797.12, 108,708 and 50,519.36 is: 69,696.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,797.12 : 108,708 = 50,519.36 : x
  2. Step 2: Convert to fraction form
    78,797.12/108,708 = 50,519.36/x
  3. Step 3: Cross multiply
    78,797.12x = 108,708 × 50,519.36
  4. Step 4: Simplify right side
    78,797.12x = 5,491,858,586.88
  5. Step 5: Solve for x
    x = 5,491,858,586.88/78,797.12
  6. Step 6: Final answer
    x = 69,696.18

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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.