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Finding the Third Proportional to 28,128 and 61,296

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Solution

The third proportional to 28,128 and 61,296 is: 133,575.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128 : 61,296 = 61,296 : x
  2. Step 2: Convert to fraction form
    28,128/61,296 = 61,296/x
  3. Step 3: Cross multiply
    28,128x = 61,296 × 61,296
  4. Step 4: Simplify right side
    28,128x = 3,757,199,616
  5. Step 5: Solve for x
    x = 3,757,199,616/28,128
  6. Step 6: Final answer
    x = 133,575.07

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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.