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Finding the Fourth Proportional to 131,491.20, 197,243.20 and 36,721.28

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Solution

The fourth proportional to 131,491.20, 197,243.20 and 36,721.28 is: 55,083.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,491.20 : 197,243.20 = 36,721.28 : x
  2. Step 2: Convert to fraction form
    131,491.20/197,243.20 = 36,721.28/x
  3. Step 3: Cross multiply
    131,491.20x = 197,243.20 × 36,721.28
  4. Step 4: Simplify right side
    131,491.20x = 7,243,022,775.30
  5. Step 5: Solve for x
    x = 7,243,022,775.30/131,491.20
  6. Step 6: Final answer
    x = 55,083.71

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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.