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Finding the Fourth Proportional to 139,969.49, 209,788.02 and 80,682.62

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Solution

The fourth proportional to 139,969.49, 209,788.02 and 80,682.62 is: 120,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969.49 : 209,788.02 = 80,682.62 : x
  2. Step 2: Convert to fraction form
    139,969.49/209,788.02 = 80,682.62/x
  3. Step 3: Cross multiply
    139,969.49x = 209,788.02 × 80,682.62
  4. Step 4: Simplify right side
    139,969.49x = 16,926,246,049.27
  5. Step 5: Solve for x
    x = 16,926,246,049.27/139,969.49
  6. Step 6: Final answer
    x = 120,928.12

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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.