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Finding the Fourth Proportional to 139,449.13, 209,188.56 and 44,645.41

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Solution

The fourth proportional to 139,449.13, 209,188.56 and 44,645.41 is: 66,972.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,449.13 : 209,188.56 = 44,645.41 : x
  2. Step 2: Convert to fraction form
    139,449.13/209,188.56 = 44,645.41/x
  3. Step 3: Cross multiply
    139,449.13x = 209,188.56 × 44,645.41
  4. Step 4: Simplify right side
    139,449.13x = 9,339,309,457.42
  5. Step 5: Solve for x
    x = 9,339,309,457.42/139,449.13
  6. Step 6: Final answer
    x = 66,972.88

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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.