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Finding the Third Proportional to 91,455 and 121,383

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Solution

The third proportional to 91,455 and 121,383 is: 161,104.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,455 : 121,383 = 121,383 : x
  2. Step 2: Convert to fraction form
    91,455/121,383 = 121,383/x
  3. Step 3: Cross multiply
    91,455x = 121,383 × 121,383
  4. Step 4: Simplify right side
    91,455x = 14,733,832,689
  5. Step 5: Solve for x
    x = 14,733,832,689/91,455
  6. Step 6: Final answer
    x = 161,104.73

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.