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Finding the Third Proportional to 72,378 and 105,975

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Solution

The third proportional to 72,378 and 105,975 is: 155,167.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378 : 105,975 = 105,975 : x
  2. Step 2: Convert to fraction form
    72,378/105,975 = 105,975/x
  3. Step 3: Cross multiply
    72,378x = 105,975 × 105,975
  4. Step 4: Simplify right side
    72,378x = 11,230,700,625
  5. Step 5: Solve for x
    x = 11,230,700,625/72,378
  6. Step 6: Final answer
    x = 155,167.32

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.