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Finding the Third Proportional to 53,015 and 81,221

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Solution

The third proportional to 53,015 and 81,221 is: 124,433.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,015 : 81,221 = 81,221 : x
  2. Step 2: Convert to fraction form
    53,015/81,221 = 81,221/x
  3. Step 3: Cross multiply
    53,015x = 81,221 × 81,221
  4. Step 4: Simplify right side
    53,015x = 6,596,850,841
  5. Step 5: Solve for x
    x = 6,596,850,841/53,015
  6. Step 6: Final answer
    x = 124,433.67

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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.