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Finding the Fourth Proportional to 66,157.88, 99,236.90 and 18,126.89

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Solution

The fourth proportional to 66,157.88, 99,236.90 and 18,126.89 is: 27,190.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,157.88 : 99,236.90 = 18,126.89 : x
  2. Step 2: Convert to fraction form
    66,157.88/99,236.90 = 18,126.89/x
  3. Step 3: Cross multiply
    66,157.88x = 99,236.90 × 18,126.89
  4. Step 4: Simplify right side
    66,157.88x = 1,798,856,550.36
  5. Step 5: Solve for x
    x = 1,798,856,550.36/66,157.88
  6. Step 6: Final answer
    x = 27,190.36

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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.