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Finding the Fourth Proportional to 67,891.77, 102,448.19 and 65,546.21

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Solution

The fourth proportional to 67,891.77, 102,448.19 and 65,546.21 is: 98,908.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,891.77 : 102,448.19 = 65,546.21 : x
  2. Step 2: Convert to fraction form
    67,891.77/102,448.19 = 65,546.21/x
  3. Step 3: Cross multiply
    67,891.77x = 102,448.19 × 65,546.21
  4. Step 4: Simplify right side
    67,891.77x = 6,715,090,995.85
  5. Step 5: Solve for x
    x = 6,715,090,995.85/67,891.77
  6. Step 6: Final answer
    x = 98,908.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.