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Finding the Fourth Proportional to 68,127.62, 102,179.25 and 20,731.21

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Solution

The fourth proportional to 68,127.62, 102,179.25 and 20,731.21 is: 31,093.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,127.62 : 102,179.25 = 20,731.21 : x
  2. Step 2: Convert to fraction form
    68,127.62/102,179.25 = 20,731.21/x
  3. Step 3: Cross multiply
    68,127.62x = 102,179.25 × 20,731.21
  4. Step 4: Simplify right side
    68,127.62x = 2,118,299,233.94
  5. Step 5: Solve for x
    x = 2,118,299,233.94/68,127.62
  6. Step 6: Final answer
    x = 31,093.11

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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.