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Finding the Fourth Proportional to 66,880.80, 100,321.20 and 27,424.80

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Solution

The fourth proportional to 66,880.80, 100,321.20 and 27,424.80 is: 41,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,880.80 : 100,321.20 = 27,424.80 : x
  2. Step 2: Convert to fraction form
    66,880.80/100,321.20 = 27,424.80/x
  3. Step 3: Cross multiply
    66,880.80x = 100,321.20 × 27,424.80
  4. Step 4: Simplify right side
    66,880.80x = 2,751,288,845.76
  5. Step 5: Solve for x
    x = 2,751,288,845.76/66,880.80
  6. Step 6: Final answer
    x = 41,137.20

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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.