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Finding the Fourth Proportional to 66,651.71, 91,975.62 and 36,431.01

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Solution

The fourth proportional to 66,651.71, 91,975.62 and 36,431.01 is: 50,272.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,651.71 : 91,975.62 = 36,431.01 : x
  2. Step 2: Convert to fraction form
    66,651.71/91,975.62 = 36,431.01/x
  3. Step 3: Cross multiply
    66,651.71x = 91,975.62 × 36,431.01
  4. Step 4: Simplify right side
    66,651.71x = 3,350,764,731.98
  5. Step 5: Solve for x
    x = 3,350,764,731.98/66,651.71
  6. Step 6: Final answer
    x = 50,272.75

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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.