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Finding the Fourth Proportional to 223,778.89, 308,805.78 and 128,219.14

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Solution

The fourth proportional to 223,778.89, 308,805.78 and 128,219.14 is: 176,937.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,778.89 : 308,805.78 = 128,219.14 : x
  2. Step 2: Convert to fraction form
    223,778.89/308,805.78 = 128,219.14/x
  3. Step 3: Cross multiply
    223,778.89x = 308,805.78 × 128,219.14
  4. Step 4: Simplify right side
    223,778.89x = 39,594,811,538.63
  5. Step 5: Solve for x
    x = 39,594,811,538.63/223,778.89
  6. Step 6: Final answer
    x = 176,937.21

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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.