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Finding the Fourth Proportional to 68,554.10, 102,713.54 and 61,620.71

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Solution

The fourth proportional to 68,554.10, 102,713.54 and 61,620.71 is: 92,325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,554.10 : 102,713.54 = 61,620.71 : x
  2. Step 2: Convert to fraction form
    68,554.10/102,713.54 = 61,620.71/x
  3. Step 3: Cross multiply
    68,554.10x = 102,713.54 × 61,620.71
  4. Step 4: Simplify right side
    68,554.10x = 6,329,280,439.74
  5. Step 5: Solve for x
    x = 6,329,280,439.74/68,554.10
  6. Step 6: Final answer
    x = 92,325.33

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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.