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Finding the Fourth Proportional to 68,139.56, 102,201.29 and 18,223.53

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Solution

The fourth proportional to 68,139.56, 102,201.29 and 18,223.53 is: 27,333.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,139.56 : 102,201.29 = 18,223.53 : x
  2. Step 2: Convert to fraction form
    68,139.56/102,201.29 = 18,223.53/x
  3. Step 3: Cross multiply
    68,139.56x = 102,201.29 × 18,223.53
  4. Step 4: Simplify right side
    68,139.56x = 1,862,467,936.66
  5. Step 5: Solve for x
    x = 1,862,467,936.66/68,139.56
  6. Step 6: Final answer
    x = 27,333.14

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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.