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Finding the Fourth Proportional to 40,491.20, 60,736.80 and 38,028.80

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Solution

The fourth proportional to 40,491.20, 60,736.80 and 38,028.80 is: 57,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,491.20 : 60,736.80 = 38,028.80 : x
  2. Step 2: Convert to fraction form
    40,491.20/60,736.80 = 38,028.80/x
  3. Step 3: Cross multiply
    40,491.20x = 60,736.80 × 38,028.80
  4. Step 4: Simplify right side
    40,491.20x = 2,309,747,619.84
  5. Step 5: Solve for x
    x = 2,309,747,619.84/40,491.20
  6. Step 6: Final answer
    x = 57,043.20

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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.