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Finding the Fourth Proportional to 66,191.75, 91,342.37 and 37,891.97

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Solution

The fourth proportional to 66,191.75, 91,342.37 and 37,891.97 is: 52,289.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,191.75 : 91,342.37 = 37,891.97 : x
  2. Step 2: Convert to fraction form
    66,191.75/91,342.37 = 37,891.97/x
  3. Step 3: Cross multiply
    66,191.75x = 91,342.37 × 37,891.97
  4. Step 4: Simplify right side
    66,191.75x = 3,461,142,343.77
  5. Step 5: Solve for x
    x = 3,461,142,343.77/66,191.75
  6. Step 6: Final answer
    x = 52,289.63

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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.