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Finding the Fourth Proportional to 171,072.60, 256,608.90 and 139,968.60

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Solution

The fourth proportional to 171,072.60, 256,608.90 and 139,968.60 is: 209,952.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,072.60 : 256,608.90 = 139,968.60 : x
  2. Step 2: Convert to fraction form
    171,072.60/256,608.90 = 139,968.60/x
  3. Step 3: Cross multiply
    171,072.60x = 256,608.90 × 139,968.60
  4. Step 4: Simplify right side
    171,072.60x = 35,917,188,480.54
  5. Step 5: Solve for x
    x = 35,917,188,480.54/171,072.60
  6. Step 6: Final answer
    x = 209,952.90

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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.