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Finding the Fourth Proportional to 68,401.68, 102,536.91 and 21,622.56

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Solution

The fourth proportional to 68,401.68, 102,536.91 and 21,622.56 is: 32,413.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,401.68 : 102,536.91 = 21,622.56 : x
  2. Step 2: Convert to fraction form
    68,401.68/102,536.91 = 21,622.56/x
  3. Step 3: Cross multiply
    68,401.68x = 102,536.91 × 21,622.56
  4. Step 4: Simplify right side
    68,401.68x = 2,217,110,488.69
  5. Step 5: Solve for x
    x = 2,217,110,488.69/68,401.68
  6. Step 6: Final answer
    x = 32,413.10

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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.