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Finding the Fourth Proportional to 66,383.57, 91,580.54 and 39,511.01

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Solution

The fourth proportional to 66,383.57, 91,580.54 and 39,511.01 is: 54,508.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,383.57 : 91,580.54 = 39,511.01 : x
  2. Step 2: Convert to fraction form
    66,383.57/91,580.54 = 39,511.01/x
  3. Step 3: Cross multiply
    66,383.57x = 91,580.54 × 39,511.01
  4. Step 4: Simplify right side
    66,383.57x = 3,618,438,976.29
  5. Step 5: Solve for x
    x = 3,618,438,976.29/66,383.57
  6. Step 6: Final answer
    x = 54,508.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.