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Finding the Fourth Proportional to 223,780.89, 308,808.54 and 128,221.14

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Solution

The fourth proportional to 223,780.89, 308,808.54 and 128,221.14 is: 176,939.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,780.89 : 308,808.54 = 128,221.14 : x
  2. Step 2: Convert to fraction form
    223,780.89/308,808.54 = 128,221.14/x
  3. Step 3: Cross multiply
    223,780.89x = 308,808.54 × 128,221.14
  4. Step 4: Simplify right side
    223,780.89x = 39,595,783,040.54
  5. Step 5: Solve for x
    x = 39,595,783,040.54/223,780.89
  6. Step 6: Final answer
    x = 176,939.97

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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.