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Finding the Fourth Proportional to 168,997.44, 232,968.06 and 128,640.90

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Solution

The fourth proportional to 168,997.44, 232,968.06 and 128,640.90 is: 177,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,997.44 : 232,968.06 = 128,640.90 : x
  2. Step 2: Convert to fraction form
    168,997.44/232,968.06 = 128,640.90/x
  3. Step 3: Cross multiply
    168,997.44x = 232,968.06 × 128,640.90
  4. Step 4: Simplify right side
    168,997.44x = 29,969,220,909.65
  5. Step 5: Solve for x
    x = 29,969,220,909.65/168,997.44
  6. Step 6: Final answer
    x = 177,335.35

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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.