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Finding the Third Proportional to 28,912 and 61,728

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Solution

The third proportional to 28,912 and 61,728 is: 131,791.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912 : 61,728 = 61,728 : x
  2. Step 2: Convert to fraction form
    28,912/61,728 = 61,728/x
  3. Step 3: Cross multiply
    28,912x = 61,728 × 61,728
  4. Step 4: Simplify right side
    28,912x = 3,810,345,984
  5. Step 5: Solve for x
    x = 3,810,345,984/28,912
  6. Step 6: Final answer
    x = 131,791.16

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.