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Finding the Fourth Proportional to 139,920.27, 209,942.24 and 73,344.48

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Solution

The fourth proportional to 139,920.27, 209,942.24 and 73,344.48 is: 110,049.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,920.27 : 209,942.24 = 73,344.48 : x
  2. Step 2: Convert to fraction form
    139,920.27/209,942.24 = 73,344.48/x
  3. Step 3: Cross multiply
    139,920.27x = 209,942.24 × 73,344.48
  4. Step 4: Simplify right side
    139,920.27x = 15,398,104,056.11
  5. Step 5: Solve for x
    x = 15,398,104,056.11/139,920.27
  6. Step 6: Final answer
    x = 110,049.13

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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.