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Finding the Fourth Proportional to 193,290.76, 289,866.66 and 66,896.70

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Solution

The fourth proportional to 193,290.76, 289,866.66 and 66,896.70 is: 100,321.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,290.76 : 289,866.66 = 66,896.70 : x
  2. Step 2: Convert to fraction form
    193,290.76/289,866.66 = 66,896.70/x
  3. Step 3: Cross multiply
    193,290.76x = 289,866.66 × 66,896.70
  4. Step 4: Simplify right side
    193,290.76x = 19,391,122,994.02
  5. Step 5: Solve for x
    x = 19,391,122,994.02/193,290.76
  6. Step 6: Final answer
    x = 100,321.00

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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.