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Finding the Fourth Proportional to 68,008.41, 102,020.38 and 18,090.54

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Solution

The fourth proportional to 68,008.41, 102,020.38 and 18,090.54 is: 27,137.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,008.41 : 102,020.38 = 18,090.54 : x
  2. Step 2: Convert to fraction form
    68,008.41/102,020.38 = 18,090.54/x
  3. Step 3: Cross multiply
    68,008.41x = 102,020.38 × 18,090.54
  4. Step 4: Simplify right side
    68,008.41x = 1,845,603,719.98
  5. Step 5: Solve for x
    x = 1,845,603,719.98/68,008.41
  6. Step 6: Final answer
    x = 27,137.87

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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.