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Finding the Fourth Proportional to 118,705.20, 177,712.20 and 115,249.20

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Solution

The fourth proportional to 118,705.20, 177,712.20 and 115,249.20 is: 172,538.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,705.20 : 177,712.20 = 115,249.20 : x
  2. Step 2: Convert to fraction form
    118,705.20/177,712.20 = 115,249.20/x
  3. Step 3: Cross multiply
    118,705.20x = 177,712.20 × 115,249.20
  4. Step 4: Simplify right side
    118,705.20x = 20,481,188,880.24
  5. Step 5: Solve for x
    x = 20,481,188,880.24/118,705.20
  6. Step 6: Final answer
    x = 172,538.26

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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.