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Finding the Fourth Proportional to 193,259.76, 289,886.76 and 66,991.92

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Solution

The fourth proportional to 193,259.76, 289,886.76 and 66,991.92 is: 100,486.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,259.76 : 289,886.76 = 66,991.92 : x
  2. Step 2: Convert to fraction form
    193,259.76/289,886.76 = 66,991.92/x
  3. Step 3: Cross multiply
    193,259.76x = 289,886.76 × 66,991.92
  4. Step 4: Simplify right side
    193,259.76x = 19,420,070,634.98
  5. Step 5: Solve for x
    x = 19,420,070,634.98/193,259.76
  6. Step 6: Final answer
    x = 100,486.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.