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Finding the Fourth Proportional to 85,170.40, 127,769.10 and 29,015.80

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Solution

The fourth proportional to 85,170.40, 127,769.10 and 29,015.80 is: 43,528.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,170.40 : 127,769.10 = 29,015.80 : x
  2. Step 2: Convert to fraction form
    85,170.40/127,769.10 = 29,015.80/x
  3. Step 3: Cross multiply
    85,170.40x = 127,769.10 × 29,015.80
  4. Step 4: Simplify right side
    85,170.40x = 3,707,322,651.78
  5. Step 5: Solve for x
    x = 3,707,322,651.78/85,170.40
  6. Step 6: Final answer
    x = 43,528.30

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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.