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Finding the Fourth Proportional to 118,520.70, 177,781.05 and 108,843.90

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Solution

The fourth proportional to 118,520.70, 177,781.05 and 108,843.90 is: 163,265.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,520.70 : 177,781.05 = 108,843.90 : x
  2. Step 2: Convert to fraction form
    118,520.70/177,781.05 = 108,843.90/x
  3. Step 3: Cross multiply
    118,520.70x = 177,781.05 × 108,843.90
  4. Step 4: Simplify right side
    118,520.70x = 19,350,382,828.10
  5. Step 5: Solve for x
    x = 19,350,382,828.10/118,520.70
  6. Step 6: Final answer
    x = 163,265.85

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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.