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Finding the Fourth Proportional to 223,665.44, 308,666.79 and 128,190.56

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Solution

The fourth proportional to 223,665.44, 308,666.79 and 128,190.56 is: 176,907.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,665.44 : 308,666.79 = 128,190.56 : x
  2. Step 2: Convert to fraction form
    223,665.44/308,666.79 = 128,190.56/x
  3. Step 3: Cross multiply
    223,665.44x = 308,666.79 × 128,190.56
  4. Step 4: Simplify right side
    223,665.44x = 39,568,167,120.17
  5. Step 5: Solve for x
    x = 39,568,167,120.17/223,665.44
  6. Step 6: Final answer
    x = 176,907.83

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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.