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Finding the Fourth Proportional to 68,019.10, 102,039.21 and 34,721.15

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Solution

The fourth proportional to 68,019.10, 102,039.21 and 34,721.15 is: 52,087.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,019.10 : 102,039.21 = 34,721.15 : x
  2. Step 2: Convert to fraction form
    68,019.10/102,039.21 = 34,721.15/x
  3. Step 3: Cross multiply
    68,019.10x = 102,039.21 × 34,721.15
  4. Step 4: Simplify right side
    68,019.10x = 3,542,918,716.29
  5. Step 5: Solve for x
    x = 3,542,918,716.29/68,019.10
  6. Step 6: Final answer
    x = 52,087.12

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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.