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Finding the Third Proportional to 61,135 and 128,905.75

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Solution

The third proportional to 61,135 and 128,905.75 is: 271,803.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,135 : 128,905.75 = 128,905.75 : x
  2. Step 2: Convert to fraction form
    61,135/128,905.75 = 128,905.75/x
  3. Step 3: Cross multiply
    61,135x = 128,905.75 × 128,905.75
  4. Step 4: Simplify right side
    61,135x = 16,616,692,383.06
  5. Step 5: Solve for x
    x = 16,616,692,383.06/61,135
  6. Step 6: Final answer
    x = 271,803.26

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.