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Finding the Fourth Proportional to 68,012.43, 102,018.51 and 18,092.61

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Solution

The fourth proportional to 68,012.43, 102,018.51 and 18,092.61 is: 27,138.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,012.43 : 102,018.51 = 18,092.61 : x
  2. Step 2: Convert to fraction form
    68,012.43/102,018.51 = 18,092.61/x
  3. Step 3: Cross multiply
    68,012.43x = 102,018.51 × 18,092.61
  4. Step 4: Simplify right side
    68,012.43x = 1,845,781,114.21
  5. Step 5: Solve for x
    x = 1,845,781,114.21/68,012.43
  6. Step 6: Final answer
    x = 27,138.88

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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.