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Finding the Fourth Proportional to 66,112.78, 99,183.78 and 19,366.06

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Solution

The fourth proportional to 66,112.78, 99,183.78 and 19,366.06 is: 29,053.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,112.78 : 99,183.78 = 19,366.06 : x
  2. Step 2: Convert to fraction form
    66,112.78/99,183.78 = 19,366.06/x
  3. Step 3: Cross multiply
    66,112.78x = 99,183.78 × 19,366.06
  4. Step 4: Simplify right side
    66,112.78x = 1,920,799,034.51
  5. Step 5: Solve for x
    x = 1,920,799,034.51/66,112.78
  6. Step 6: Final answer
    x = 29,053.37

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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.