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Finding the Third Proportional to 31,257.75 and 66,615.75

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Solution

The third proportional to 31,257.75 and 66,615.75 is: 141,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,257.75 : 66,615.75 = 66,615.75 : x
  2. Step 2: Convert to fraction form
    31,257.75/66,615.75 = 66,615.75/x
  3. Step 3: Cross multiply
    31,257.75x = 66,615.75 × 66,615.75
  4. Step 4: Simplify right side
    31,257.75x = 4,437,658,148.06
  5. Step 5: Solve for x
    x = 4,437,658,148.06/31,257.75
  6. Step 6: Final answer
    x = 141,969.85

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.