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Finding the Fourth Proportional to 66,439, 99,658.86 and 17,191

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Solution

The fourth proportional to 66,439, 99,658.86 and 17,191 is: 25,786.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439 : 99,658.86 = 17,191 : x
  2. Step 2: Convert to fraction form
    66,439/99,658.86 = 17,191/x
  3. Step 3: Cross multiply
    66,439x = 99,658.86 × 17,191
  4. Step 4: Simplify right side
    66,439x = 1,713,235,462.26
  5. Step 5: Solve for x
    x = 1,713,235,462.26/66,439
  6. Step 6: Final answer
    x = 25,786.59

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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.