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Finding the Third Proportional to 61,381.50 and 128,955

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Solution

The third proportional to 61,381.50 and 128,955 is: 270,918.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,381.50 : 128,955 = 128,955 : x
  2. Step 2: Convert to fraction form
    61,381.50/128,955 = 128,955/x
  3. Step 3: Cross multiply
    61,381.50x = 128,955 × 128,955
  4. Step 4: Simplify right side
    61,381.50x = 16,629,392,025
  5. Step 5: Solve for x
    x = 16,629,392,025/61,381.50
  6. Step 6: Final answer
    x = 270,918.63

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.