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Finding the Fourth Proportional to 223,703.36, 308,723.94 and 128,216.19

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Solution

The fourth proportional to 223,703.36, 308,723.94 and 128,216.19 is: 176,945.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,703.36 : 308,723.94 = 128,216.19 : x
  2. Step 2: Convert to fraction form
    223,703.36/308,723.94 = 128,216.19/x
  3. Step 3: Cross multiply
    223,703.36x = 308,723.94 × 128,216.19
  4. Step 4: Simplify right side
    223,703.36x = 39,583,407,348.59
  5. Step 5: Solve for x
    x = 39,583,407,348.59/223,703.36
  6. Step 6: Final answer
    x = 176,945.97

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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.