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Finding the Fourth Proportional to 66,611.84, 99,917.73 and 19,864.71

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Solution

The fourth proportional to 66,611.84, 99,917.73 and 19,864.71 is: 29,797.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.84 : 99,917.73 = 19,864.71 : x
  2. Step 2: Convert to fraction form
    66,611.84/99,917.73 = 19,864.71/x
  3. Step 3: Cross multiply
    66,611.84x = 99,917.73 × 19,864.71
  4. Step 4: Simplify right side
    66,611.84x = 1,984,836,730.31
  5. Step 5: Solve for x
    x = 1,984,836,730.31/66,611.84
  6. Step 6: Final answer
    x = 29,797.06

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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.