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Finding the Fourth Proportional to 66,173.40, 99,238.77 and 21,789.59

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Solution

The fourth proportional to 66,173.40, 99,238.77 and 21,789.59 is: 32,677.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,173.40 : 99,238.77 = 21,789.59 : x
  2. Step 2: Convert to fraction form
    66,173.40/99,238.77 = 21,789.59/x
  3. Step 3: Cross multiply
    66,173.40x = 99,238.77 × 21,789.59
  4. Step 4: Simplify right side
    66,173.40x = 2,162,372,110.40
  5. Step 5: Solve for x
    x = 2,162,372,110.40/66,173.40
  6. Step 6: Final answer
    x = 32,677.36

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1.5x scale

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.