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Finding the Fourth Proportional to 69,836.95, 104,791.88 and 66,072.88

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Solution

The fourth proportional to 69,836.95, 104,791.88 and 66,072.88 is: 99,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,836.95 : 104,791.88 = 66,072.88 : x
  2. Step 2: Convert to fraction form
    69,836.95/104,791.88 = 66,072.88/x
  3. Step 3: Cross multiply
    69,836.95x = 104,791.88 × 66,072.88
  4. Step 4: Simplify right side
    69,836.95x = 6,923,901,312.21
  5. Step 5: Solve for x
    x = 6,923,901,312.21/69,836.95
  6. Step 6: Final answer
    x = 99,143.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.