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Finding the Fourth Proportional to 216,467.28, 324,735.48 and 66,671.28

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Solution

The fourth proportional to 216,467.28, 324,735.48 and 66,671.28 is: 100,017.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,467.28 : 324,735.48 = 66,671.28 : x
  2. Step 2: Convert to fraction form
    216,467.28/324,735.48 = 66,671.28/x
  3. Step 3: Cross multiply
    216,467.28x = 324,735.48 × 66,671.28
  4. Step 4: Simplify right side
    216,467.28x = 21,650,530,113.01
  5. Step 5: Solve for x
    x = 21,650,530,113.01/216,467.28
  6. Step 6: Final answer
    x = 100,017.56

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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.