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Finding the Fourth Proportional to 67,121.58, 92,620.11 and 53,687.94

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Solution

The fourth proportional to 67,121.58, 92,620.11 and 53,687.94 is: 74,083.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,121.58 : 92,620.11 = 53,687.94 : x
  2. Step 2: Convert to fraction form
    67,121.58/92,620.11 = 53,687.94/x
  3. Step 3: Cross multiply
    67,121.58x = 92,620.11 × 53,687.94
  4. Step 4: Simplify right side
    67,121.58x = 4,972,582,908.47
  5. Step 5: Solve for x
    x = 4,972,582,908.47/67,121.58
  6. Step 6: Final answer
    x = 74,083.22

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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.