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Finding the Fourth Proportional to 223,680.30, 308,660.67 and 128,195.34

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Solution

The fourth proportional to 223,680.30, 308,660.67 and 128,195.34 is: 176,899.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,680.30 : 308,660.67 = 128,195.34 : x
  2. Step 2: Convert to fraction form
    223,680.30/308,660.67 = 128,195.34/x
  3. Step 3: Cross multiply
    223,680.30x = 308,660.67 × 128,195.34
  4. Step 4: Simplify right side
    223,680.30x = 39,568,859,535.28
  5. Step 5: Solve for x
    x = 39,568,859,535.28/223,680.30
  6. Step 6: Final answer
    x = 176,899.17

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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.