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Finding the Fourth Proportional to 171,057.80, 256,845.90 and 131,659.40

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Solution

The fourth proportional to 171,057.80, 256,845.90 and 131,659.40 is: 197,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,057.80 : 256,845.90 = 131,659.40 : x
  2. Step 2: Convert to fraction form
    171,057.80/256,845.90 = 131,659.40/x
  3. Step 3: Cross multiply
    171,057.80x = 256,845.90 × 131,659.40
  4. Step 4: Simplify right side
    171,057.80x = 33,816,177,086.46
  5. Step 5: Solve for x
    x = 33,816,177,086.46/171,057.80
  6. Step 6: Final answer
    x = 197,688.60

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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.