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Finding the Fourth Proportional to 203,686.36, 305,563.38 and 85,366.60

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Solution

The fourth proportional to 203,686.36, 305,563.38 and 85,366.60 is: 128,064.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,686.36 : 305,563.38 = 85,366.60 : x
  2. Step 2: Convert to fraction form
    203,686.36/305,563.38 = 85,366.60/x
  3. Step 3: Cross multiply
    203,686.36x = 305,563.38 × 85,366.60
  4. Step 4: Simplify right side
    203,686.36x = 26,084,906,835.11
  5. Step 5: Solve for x
    x = 26,084,906,835.11/203,686.36
  6. Step 6: Final answer
    x = 128,064.08

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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.