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Finding the Fourth Proportional to 115,661.44, 159,615.20 and 65,361.60

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Solution

The fourth proportional to 115,661.44, 159,615.20 and 65,361.60 is: 90,200.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,661.44 : 159,615.20 = 65,361.60 : x
  2. Step 2: Convert to fraction form
    115,661.44/159,615.20 = 65,361.60/x
  3. Step 3: Cross multiply
    115,661.44x = 159,615.20 × 65,361.60
  4. Step 4: Simplify right side
    115,661.44x = 10,432,704,856.32
  5. Step 5: Solve for x
    x = 10,432,704,856.32/115,661.44
  6. Step 6: Final answer
    x = 90,200.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.