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Finding the Fourth Proportional to 66,134.88, 91,231.92 and 40,940.64

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Solution

The fourth proportional to 66,134.88, 91,231.92 and 40,940.64 is: 56,476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,134.88 : 91,231.92 = 40,940.64 : x
  2. Step 2: Convert to fraction form
    66,134.88/91,231.92 = 40,940.64/x
  3. Step 3: Cross multiply
    66,134.88x = 91,231.92 × 40,940.64
  4. Step 4: Simplify right side
    66,134.88x = 3,735,093,193.23
  5. Step 5: Solve for x
    x = 3,735,093,193.23/66,134.88
  6. Step 6: Final answer
    x = 56,476.90

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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.