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Finding the Fourth Proportional to 68,061.98, 102,092.98 and 21,318.50

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Solution

The fourth proportional to 68,061.98, 102,092.98 and 21,318.50 is: 31,977.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,061.98 : 102,092.98 = 21,318.50 : x
  2. Step 2: Convert to fraction form
    68,061.98/102,092.98 = 21,318.50/x
  3. Step 3: Cross multiply
    68,061.98x = 102,092.98 × 21,318.50
  4. Step 4: Simplify right side
    68,061.98x = 2,176,469,194.13
  5. Step 5: Solve for x
    x = 2,176,469,194.13/68,061.98
  6. Step 6: Final answer
    x = 31,977.75

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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.