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Finding the Fourth Proportional to 68,496.17, 102,753.92 and 21,115.11

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Solution

The fourth proportional to 68,496.17, 102,753.92 and 21,115.11 is: 31,675.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,496.17 : 102,753.92 = 21,115.11 : x
  2. Step 2: Convert to fraction form
    68,496.17/102,753.92 = 21,115.11/x
  3. Step 3: Cross multiply
    68,496.17x = 102,753.92 × 21,115.11
  4. Step 4: Simplify right side
    68,496.17x = 2,169,660,323.73
  5. Step 5: Solve for x
    x = 2,169,660,323.73/68,496.17
  6. Step 6: Final answer
    x = 31,675.64

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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.