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Finding the Fourth Proportional to 68,599.74, 102,901.42 and 18,680.86

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Solution

The fourth proportional to 68,599.74, 102,901.42 and 18,680.86 is: 28,021.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,599.74 : 102,901.42 = 18,680.86 : x
  2. Step 2: Convert to fraction form
    68,599.74/102,901.42 = 18,680.86/x
  3. Step 3: Cross multiply
    68,599.74x = 102,901.42 × 18,680.86
  4. Step 4: Simplify right side
    68,599.74x = 1,922,287,172.80
  5. Step 5: Solve for x
    x = 1,922,287,172.80/68,599.74
  6. Step 6: Final answer
    x = 28,021.78

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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.