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Finding the Fourth Proportional to 139,874.80, 209,874.20 and 73,299.12

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Solution

The fourth proportional to 139,874.80, 209,874.20 and 73,299.12 is: 109,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,874.80 : 209,874.20 = 73,299.12 : x
  2. Step 2: Convert to fraction form
    139,874.80/209,874.20 = 73,299.12/x
  3. Step 3: Cross multiply
    139,874.80x = 209,874.20 × 73,299.12
  4. Step 4: Simplify right side
    139,874.80x = 15,383,594,170.70
  5. Step 5: Solve for x
    x = 15,383,594,170.70/139,874.80
  6. Step 6: Final answer
    x = 109,981.17

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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.