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Finding the Third Proportional to 53,388 and 81,018

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Solution

The third proportional to 53,388 and 81,018 is: 122,947.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,388 : 81,018 = 81,018 : x
  2. Step 2: Convert to fraction form
    53,388/81,018 = 81,018/x
  3. Step 3: Cross multiply
    53,388x = 81,018 × 81,018
  4. Step 4: Simplify right side
    53,388x = 6,563,916,324
  5. Step 5: Solve for x
    x = 6,563,916,324/53,388
  6. Step 6: Final answer
    x = 122,947.41

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.