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Finding the Fourth Proportional to 66,581.53, 99,866.79 and 19,834.39

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Solution

The fourth proportional to 66,581.53, 99,866.79 and 19,834.39 is: 29,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,581.53 : 99,866.79 = 19,834.39 : x
  2. Step 2: Convert to fraction form
    66,581.53/99,866.79 = 19,834.39/x
  3. Step 3: Cross multiply
    66,581.53x = 99,866.79 × 19,834.39
  4. Step 4: Simplify right side
    66,581.53x = 1,980,796,860.91
  5. Step 5: Solve for x
    x = 1,980,796,860.91/66,581.53
  6. Step 6: Final answer
    x = 29,749.95

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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.