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Finding the Third Proportional to 53,156 and 81,145

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Solution

The third proportional to 53,156 and 81,145 is: 123,871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,156 : 81,145 = 81,145 : x
  2. Step 2: Convert to fraction form
    53,156/81,145 = 81,145/x
  3. Step 3: Cross multiply
    53,156x = 81,145 × 81,145
  4. Step 4: Simplify right side
    53,156x = 6,584,511,025
  5. Step 5: Solve for x
    x = 6,584,511,025/53,156
  6. Step 6: Final answer
    x = 123,871.45

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.