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Finding the Fourth Proportional to 223,687.28, 308,687.28 and 128,191.52

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Solution

The fourth proportional to 223,687.28, 308,687.28 and 128,191.52 is: 176,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,687.28 : 308,687.28 = 128,191.52 : x
  2. Step 2: Convert to fraction form
    223,687.28/308,687.28 = 128,191.52/x
  3. Step 3: Cross multiply
    223,687.28x = 308,687.28 × 128,191.52
  4. Step 4: Simplify right side
    223,687.28x = 39,571,091,627.87
  5. Step 5: Solve for x
    x = 39,571,091,627.87/223,687.28
  6. Step 6: Final answer
    x = 176,903.63

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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.