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Finding the Fourth Proportional to 66,081.70, 99,137.94 and 19,338.22

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Solution

The fourth proportional to 66,081.70, 99,137.94 and 19,338.22 is: 29,011.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,081.70 : 99,137.94 = 19,338.22 : x
  2. Step 2: Convert to fraction form
    66,081.70/99,137.94 = 19,338.22/x
  3. Step 3: Cross multiply
    66,081.70x = 99,137.94 × 19,338.22
  4. Step 4: Simplify right side
    66,081.70x = 1,917,151,294.07
  5. Step 5: Solve for x
    x = 1,917,151,294.07/66,081.70
  6. Step 6: Final answer
    x = 29,011.83

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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.