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Finding the Fourth Proportional to 66,001.78, 98,992.14 and 19,243.72

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Solution

The fourth proportional to 66,001.78, 98,992.14 and 19,243.72 is: 28,862.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,001.78 : 98,992.14 = 19,243.72 : x
  2. Step 2: Convert to fraction form
    66,001.78/98,992.14 = 19,243.72/x
  3. Step 3: Cross multiply
    66,001.78x = 98,992.14 × 19,243.72
  4. Step 4: Simplify right side
    66,001.78x = 1,904,977,024.36
  5. Step 5: Solve for x
    x = 1,904,977,024.36/66,001.78
  6. Step 6: Final answer
    x = 28,862.51

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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.