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Finding the Fourth Proportional to 211,910.22, 317,745.52 and 69,717.02

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Solution

The fourth proportional to 211,910.22, 317,745.52 and 69,717.02 is: 104,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,910.22 : 317,745.52 = 69,717.02 : x
  2. Step 2: Convert to fraction form
    211,910.22/317,745.52 = 69,717.02/x
  3. Step 3: Cross multiply
    211,910.22x = 317,745.52 × 69,717.02
  4. Step 4: Simplify right side
    211,910.22x = 22,152,269,009.73
  5. Step 5: Solve for x
    x = 22,152,269,009.73/211,910.22
  6. Step 6: Final answer
    x = 104,536.11

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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.