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Finding the Fourth Proportional to 92,859.14, 139,480.68 and 75,109.61

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Solution

The fourth proportional to 92,859.14, 139,480.68 and 75,109.61 is: 112,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,859.14 : 139,480.68 = 75,109.61 : x
  2. Step 2: Convert to fraction form
    92,859.14/139,480.68 = 75,109.61/x
  3. Step 3: Cross multiply
    92,859.14x = 139,480.68 × 75,109.61
  4. Step 4: Simplify right side
    92,859.14x = 10,476,340,107.70
  5. Step 5: Solve for x
    x = 10,476,340,107.70/92,859.14
  6. Step 6: Final answer
    x = 112,819.69

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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.