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Finding the Fourth Proportional to 68,754.69, 103,132.12 and 18,835.22

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Solution

The fourth proportional to 68,754.69, 103,132.12 and 18,835.22 is: 28,252.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,754.69 : 103,132.12 = 18,835.22 : x
  2. Step 2: Convert to fraction form
    68,754.69/103,132.12 = 18,835.22/x
  3. Step 3: Cross multiply
    68,754.69x = 103,132.12 × 18,835.22
  4. Step 4: Simplify right side
    68,754.69x = 1,942,516,450.64
  5. Step 5: Solve for x
    x = 1,942,516,450.64/68,754.69
  6. Step 6: Final answer
    x = 28,252.86

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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.