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Finding the Fourth Proportional to 68,754.45, 103,131.76 and 18,834.98

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Solution

The fourth proportional to 68,754.45, 103,131.76 and 18,834.98 is: 28,252.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,754.45 : 103,131.76 = 18,834.98 : x
  2. Step 2: Convert to fraction form
    68,754.45/103,131.76 = 18,834.98/x
  3. Step 3: Cross multiply
    68,754.45x = 103,131.76 × 18,834.98
  4. Step 4: Simplify right side
    68,754.45x = 1,942,484,636.96
  5. Step 5: Solve for x
    x = 1,942,484,636.96/68,754.45
  6. Step 6: Final answer
    x = 28,252.49

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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.