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Finding the Third Proportional to 39,530.50 and 86,435

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Solution

The third proportional to 39,530.50 and 86,435 is: 188,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,530.50 : 86,435 = 86,435 : x
  2. Step 2: Convert to fraction form
    39,530.50/86,435 = 86,435/x
  3. Step 3: Cross multiply
    39,530.50x = 86,435 × 86,435
  4. Step 4: Simplify right side
    39,530.50x = 7,471,009,225
  5. Step 5: Solve for x
    x = 7,471,009,225/39,530.50
  6. Step 6: Final answer
    x = 188,993.54

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.