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Finding the Fourth Proportional to 42,321.97, 63,512.16 and 14,619.97

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Solution

The fourth proportional to 42,321.97, 63,512.16 and 14,619.97 is: 21,940.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,321.97 : 63,512.16 = 14,619.97 : x
  2. Step 2: Convert to fraction form
    42,321.97/63,512.16 = 14,619.97/x
  3. Step 3: Cross multiply
    42,321.97x = 63,512.16 × 14,619.97
  4. Step 4: Simplify right side
    42,321.97x = 928,545,873.84
  5. Step 5: Solve for x
    x = 928,545,873.84/42,321.97
  6. Step 6: Final answer
    x = 21,940.04

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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.