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Finding the Third Proportional to 20,741.50 and 45,515

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Solution

The third proportional to 20,741.50 and 45,515 is: 99,877.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.50 : 45,515 = 45,515 : x
  2. Step 2: Convert to fraction form
    20,741.50/45,515 = 45,515/x
  3. Step 3: Cross multiply
    20,741.50x = 45,515 × 45,515
  4. Step 4: Simplify right side
    20,741.50x = 2,071,615,225
  5. Step 5: Solve for x
    x = 2,071,615,225/20,741.50
  6. Step 6: Final answer
    x = 99,877.79

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.