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Finding the Fourth Proportional to 127,912.80, 191,883.60 and 39,165.60

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Solution

The fourth proportional to 127,912.80, 191,883.60 and 39,165.60 is: 58,752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,912.80 : 191,883.60 = 39,165.60 : x
  2. Step 2: Convert to fraction form
    127,912.80/191,883.60 = 39,165.60/x
  3. Step 3: Cross multiply
    127,912.80x = 191,883.60 × 39,165.60
  4. Step 4: Simplify right side
    127,912.80x = 7,515,236,324.16
  5. Step 5: Solve for x
    x = 7,515,236,324.16/127,912.80
  6. Step 6: Final answer
    x = 58,752.81

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1.5x scale

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.