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Finding the Fourth Proportional to 118,418.20, 177,627.30 and 99,755.80

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Solution

The fourth proportional to 118,418.20, 177,627.30 and 99,755.80 is: 149,633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,418.20 : 177,627.30 = 99,755.80 : x
  2. Step 2: Convert to fraction form
    118,418.20/177,627.30 = 99,755.80/x
  3. Step 3: Cross multiply
    118,418.20x = 177,627.30 × 99,755.80
  4. Step 4: Simplify right side
    118,418.20x = 17,719,353,413.34
  5. Step 5: Solve for x
    x = 17,719,353,413.34/118,418.20
  6. Step 6: Final answer
    x = 149,633.70

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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.