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Finding the Fourth Proportional to 118,375.78, 163,363.38 and 68,074.78

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Solution

The fourth proportional to 118,375.78, 163,363.38 and 68,074.78 is: 93,945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,375.78 : 163,363.38 = 68,074.78 : x
  2. Step 2: Convert to fraction form
    118,375.78/163,363.38 = 68,074.78/x
  3. Step 3: Cross multiply
    118,375.78x = 163,363.38 × 68,074.78
  4. Step 4: Simplify right side
    118,375.78x = 11,120,926,153.56
  5. Step 5: Solve for x
    x = 11,120,926,153.56/118,375.78
  6. Step 6: Final answer
    x = 93,945.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.