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Finding the Fourth Proportional to 68,957.72, 95,129.10 and 58,993.20

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Solution

The fourth proportional to 68,957.72, 95,129.10 and 58,993.20 is: 81,382.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,957.72 : 95,129.10 = 58,993.20 : x
  2. Step 2: Convert to fraction form
    68,957.72/95,129.10 = 58,993.20/x
  3. Step 3: Cross multiply
    68,957.72x = 95,129.10 × 58,993.20
  4. Step 4: Simplify right side
    68,957.72x = 5,611,970,022.12
  5. Step 5: Solve for x
    x = 5,611,970,022.12/68,957.72
  6. Step 6: Final answer
    x = 81,382.77

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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.