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Finding the Fourth Proportional to 66,606.41, 91,915.78 and 36,391.09

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Solution

The fourth proportional to 66,606.41, 91,915.78 and 36,391.09 is: 50,219.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.41 : 91,915.78 = 36,391.09 : x
  2. Step 2: Convert to fraction form
    66,606.41/91,915.78 = 36,391.09/x
  3. Step 3: Cross multiply
    66,606.41x = 91,915.78 × 36,391.09
  4. Step 4: Simplify right side
    66,606.41x = 3,344,915,101.63
  5. Step 5: Solve for x
    x = 3,344,915,101.63/66,606.41
  6. Step 6: Final answer
    x = 50,219.12

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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.