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Finding the Fourth Proportional to 66,292.74, 91,481.24 and 36,078.12

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Solution

The fourth proportional to 66,292.74, 91,481.24 and 36,078.12 is: 49,786.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,292.74 : 91,481.24 = 36,078.12 : x
  2. Step 2: Convert to fraction form
    66,292.74/91,481.24 = 36,078.12/x
  3. Step 3: Cross multiply
    66,292.74x = 91,481.24 × 36,078.12
  4. Step 4: Simplify right side
    66,292.74x = 3,300,470,974.08
  5. Step 5: Solve for x
    x = 3,300,470,974.08/66,292.74
  6. Step 6: Final answer
    x = 49,786.31

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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.