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Finding the Fourth Proportional to 68,696.72, 102,910.91 and 47,345.66

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Solution

The fourth proportional to 68,696.72, 102,910.91 and 47,345.66 is: 70,926.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,696.72 : 102,910.91 = 47,345.66 : x
  2. Step 2: Convert to fraction form
    68,696.72/102,910.91 = 47,345.66/x
  3. Step 3: Cross multiply
    68,696.72x = 102,910.91 × 47,345.66
  4. Step 4: Simplify right side
    68,696.72x = 4,872,384,203.87
  5. Step 5: Solve for x
    x = 4,872,384,203.87/68,696.72
  6. Step 6: Final answer
    x = 70,926.01

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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.