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Finding the Fourth Proportional to 66,619.87, 91,940.65 and 37,940.74

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Solution

The fourth proportional to 66,619.87, 91,940.65 and 37,940.74 is: 52,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,619.87 : 91,940.65 = 37,940.74 : x
  2. Step 2: Convert to fraction form
    66,619.87/91,940.65 = 37,940.74/x
  3. Step 3: Cross multiply
    66,619.87x = 91,940.65 × 37,940.74
  4. Step 4: Simplify right side
    66,619.87x = 3,488,296,185.79
  5. Step 5: Solve for x
    x = 3,488,296,185.79/66,619.87
  6. Step 6: Final answer
    x = 52,361.20

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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.