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Finding the Third Proportional to 21,378 and 46,779

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Solution

The third proportional to 21,378 and 46,779 is: 102,361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378 : 46,779 = 46,779 : x
  2. Step 2: Convert to fraction form
    21,378/46,779 = 46,779/x
  3. Step 3: Cross multiply
    21,378x = 46,779 × 46,779
  4. Step 4: Simplify right side
    21,378x = 2,188,274,841
  5. Step 5: Solve for x
    x = 2,188,274,841/21,378
  6. Step 6: Final answer
    x = 102,361.06

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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.