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Finding the Fourth Proportional to 68,108.85, 102,179.61 and 21,361.71

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Solution

The fourth proportional to 68,108.85, 102,179.61 and 21,361.71 is: 32,047.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,108.85 : 102,179.61 = 21,361.71 : x
  2. Step 2: Convert to fraction form
    68,108.85/102,179.61 = 21,361.71/x
  3. Step 3: Cross multiply
    68,108.85x = 102,179.61 × 21,361.71
  4. Step 4: Simplify right side
    68,108.85x = 2,182,731,196.73
  5. Step 5: Solve for x
    x = 2,182,731,196.73/68,108.85
  6. Step 6: Final answer
    x = 32,047.69

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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.