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Finding the Fourth Proportional to 171,986.60, 257,469.60 and 127,809.20

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Solution

The fourth proportional to 171,986.60, 257,469.60 and 127,809.20 is: 191,334.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,986.60 : 257,469.60 = 127,809.20 : x
  2. Step 2: Convert to fraction form
    171,986.60/257,469.60 = 127,809.20/x
  3. Step 3: Cross multiply
    171,986.60x = 257,469.60 × 127,809.20
  4. Step 4: Simplify right side
    171,986.60x = 32,906,983,600.32
  5. Step 5: Solve for x
    x = 32,906,983,600.32/171,986.60
  6. Step 6: Final answer
    x = 191,334.58

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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.