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Finding the Fourth Proportional to 66,606.30, 91,915.61 and 36,390.97

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Solution

The fourth proportional to 66,606.30, 91,915.61 and 36,390.97 is: 50,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.30 : 91,915.61 = 36,390.97 : x
  2. Step 2: Convert to fraction form
    66,606.30/91,915.61 = 36,390.97/x
  3. Step 3: Cross multiply
    66,606.30x = 91,915.61 × 36,390.97
  4. Step 4: Simplify right side
    66,606.30x = 3,344,898,024.09
  5. Step 5: Solve for x
    x = 3,344,898,024.09/66,606.30
  6. Step 6: Final answer
    x = 50,218.95

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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.