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Finding the Fourth Proportional to 223,563.54, 308,561.49 and 128,134.20

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Solution

The fourth proportional to 223,563.54, 308,561.49 and 128,134.20 is: 176,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,563.54 : 308,561.49 = 128,134.20 : x
  2. Step 2: Convert to fraction form
    223,563.54/308,561.49 = 128,134.20/x
  3. Step 3: Cross multiply
    223,563.54x = 308,561.49 × 128,134.20
  4. Step 4: Simplify right side
    223,563.54x = 39,537,279,671.96
  5. Step 5: Solve for x
    x = 39,537,279,671.96/223,563.54
  6. Step 6: Final answer
    x = 176,850.30

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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.