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Finding the Fourth Proportional to 66,620.72, 91,976.64 and 41,504.24

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Solution

The fourth proportional to 66,620.72, 91,976.64 and 41,504.24 is: 57,300.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.72 : 91,976.64 = 41,504.24 : x
  2. Step 2: Convert to fraction form
    66,620.72/91,976.64 = 41,504.24/x
  3. Step 3: Cross multiply
    66,620.72x = 91,976.64 × 41,504.24
  4. Step 4: Simplify right side
    66,620.72x = 3,817,420,540.95
  5. Step 5: Solve for x
    x = 3,817,420,540.95/66,620.72
  6. Step 6: Final answer
    x = 57,300.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.