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Finding the Fourth Proportional to 68,616.60, 103,019.35 and 34,905.43

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Solution

The fourth proportional to 68,616.60, 103,019.35 and 34,905.43 is: 52,406.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,616.60 : 103,019.35 = 34,905.43 : x
  2. Step 2: Convert to fraction form
    68,616.60/103,019.35 = 34,905.43/x
  3. Step 3: Cross multiply
    68,616.60x = 103,019.35 × 34,905.43
  4. Step 4: Simplify right side
    68,616.60x = 3,595,934,710.07
  5. Step 5: Solve for x
    x = 3,595,934,710.07/68,616.60
  6. Step 6: Final answer
    x = 52,406.19

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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.