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Finding the Fourth Proportional to 68,071.73, 102,107.64 and 21,328.25

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Solution

The fourth proportional to 68,071.73, 102,107.64 and 21,328.25 is: 31,992.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,071.73 : 102,107.64 = 21,328.25 : x
  2. Step 2: Convert to fraction form
    68,071.73/102,107.64 = 21,328.25/x
  3. Step 3: Cross multiply
    68,071.73x = 102,107.64 × 21,328.25
  4. Step 4: Simplify right side
    68,071.73x = 2,177,777,272.83
  5. Step 5: Solve for x
    x = 2,177,777,272.83/68,071.73
  6. Step 6: Final answer
    x = 31,992.39

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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.