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Finding the Fourth Proportional to 85,777.09, 128,621.76 and 35,843.56

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Solution

The fourth proportional to 85,777.09, 128,621.76 and 35,843.56 is: 53,747.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,777.09 : 128,621.76 = 35,843.56 : x
  2. Step 2: Convert to fraction form
    85,777.09/128,621.76 = 35,843.56/x
  3. Step 3: Cross multiply
    85,777.09x = 128,621.76 × 35,843.56
  4. Step 4: Simplify right side
    85,777.09x = 4,610,261,771.87
  5. Step 5: Solve for x
    x = 4,610,261,771.87/85,777.09
  6. Step 6: Final answer
    x = 53,747.01

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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.