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Finding the Fourth Proportional to 71,891.28, 107,842.39 and 52,405.11

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Solution

The fourth proportional to 71,891.28, 107,842.39 and 52,405.11 is: 78,611.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,891.28 : 107,842.39 = 52,405.11 : x
  2. Step 2: Convert to fraction form
    71,891.28/107,842.39 = 52,405.11/x
  3. Step 3: Cross multiply
    71,891.28x = 107,842.39 × 52,405.11
  4. Step 4: Simplify right side
    71,891.28x = 5,651,492,179.60
  5. Step 5: Solve for x
    x = 5,651,492,179.60/71,891.28
  6. Step 6: Final answer
    x = 78,611.65

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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.