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Finding the Fourth Proportional to 73,578.38, 109,756.69 and 71,118.41

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Solution

The fourth proportional to 73,578.38, 109,756.69 and 71,118.41 is: 106,087.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,578.38 : 109,756.69 = 71,118.41 : x
  2. Step 2: Convert to fraction form
    73,578.38/109,756.69 = 71,118.41/x
  3. Step 3: Cross multiply
    73,578.38x = 109,756.69 × 71,118.41
  4. Step 4: Simplify right side
    73,578.38x = 7,805,720,553.08
  5. Step 5: Solve for x
    x = 7,805,720,553.08/73,578.38
  6. Step 6: Final answer
    x = 106,087.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.