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Finding the Fourth Proportional to 203,686.61, 305,533.35 and 70,570.79

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Solution

The fourth proportional to 203,686.61, 305,533.35 and 70,570.79 is: 105,857.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,686.61 : 305,533.35 = 70,570.79 : x
  2. Step 2: Convert to fraction form
    203,686.61/305,533.35 = 70,570.79/x
  3. Step 3: Cross multiply
    203,686.61x = 305,533.35 × 70,570.79
  4. Step 4: Simplify right side
    203,686.61x = 21,561,729,880.85
  5. Step 5: Solve for x
    x = 21,561,729,880.85/203,686.61
  6. Step 6: Final answer
    x = 105,857.38

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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.