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Finding the Third Proportional to 66,859.25 and 145,709.50

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Solution

The third proportional to 66,859.25 and 145,709.50 is: 317,551.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,859.25 : 145,709.50 = 145,709.50 : x
  2. Step 2: Convert to fraction form
    66,859.25/145,709.50 = 145,709.50/x
  3. Step 3: Cross multiply
    66,859.25x = 145,709.50 × 145,709.50
  4. Step 4: Simplify right side
    66,859.25x = 21,231,258,390.25
  5. Step 5: Solve for x
    x = 21,231,258,390.25/66,859.25
  6. Step 6: Final answer
    x = 317,551.55

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.