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Finding the Third Proportional to 63,405 and 135,805.50

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Solution

The third proportional to 63,405 and 135,805.50 is: 290,878.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,405 : 135,805.50 = 135,805.50 : x
  2. Step 2: Convert to fraction form
    63,405/135,805.50 = 135,805.50/x
  3. Step 3: Cross multiply
    63,405x = 135,805.50 × 135,805.50
  4. Step 4: Simplify right side
    63,405x = 18,443,133,830.25
  5. Step 5: Solve for x
    x = 18,443,133,830.25/63,405
  6. Step 6: Final answer
    x = 290,878.22

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.