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Finding the Third Proportional to 121,464 and 256,131

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Solution

The third proportional to 121,464 and 256,131 is: 540,103.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,464 : 256,131 = 256,131 : x
  2. Step 2: Convert to fraction form
    121,464/256,131 = 256,131/x
  3. Step 3: Cross multiply
    121,464x = 256,131 × 256,131
  4. Step 4: Simplify right side
    121,464x = 65,603,089,161
  5. Step 5: Solve for x
    x = 65,603,089,161/121,464
  6. Step 6: Final answer
    x = 540,103.15

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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.