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Finding the Fourth Proportional to 216,467.64, 324,737.00 and 66,707.95

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Solution

The fourth proportional to 216,467.64, 324,737.00 and 66,707.95 is: 100,072.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,467.64 : 324,737.00 = 66,707.95 : x
  2. Step 2: Convert to fraction form
    216,467.64/324,737.00 = 66,707.95/x
  3. Step 3: Cross multiply
    216,467.64x = 324,737.00 × 66,707.95
  4. Step 4: Simplify right side
    216,467.64x = 21,662,540,037.45
  5. Step 5: Solve for x
    x = 21,662,540,037.45/216,467.64
  6. Step 6: Final answer
    x = 100,072.88

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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.