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Finding the Fourth Proportional to 85,896.40, 128,847.84 and 23,571.76

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Solution

The fourth proportional to 85,896.40, 128,847.84 and 23,571.76 is: 35,358.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,896.40 : 128,847.84 = 23,571.76 : x
  2. Step 2: Convert to fraction form
    85,896.40/128,847.84 = 23,571.76/x
  3. Step 3: Cross multiply
    85,896.40x = 128,847.84 × 23,571.76
  4. Step 4: Simplify right side
    85,896.40x = 3,037,170,361.00
  5. Step 5: Solve for x
    x = 3,037,170,361.00/85,896.40
  6. Step 6: Final answer
    x = 35,358.53

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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.