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Finding the Third Proportional to 78,806 and 121,125

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Solution

The third proportional to 78,806 and 121,125 is: 186,169.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,806 : 121,125 = 121,125 : x
  2. Step 2: Convert to fraction form
    78,806/121,125 = 121,125/x
  3. Step 3: Cross multiply
    78,806x = 121,125 × 121,125
  4. Step 4: Simplify right side
    78,806x = 14,671,265,625
  5. Step 5: Solve for x
    x = 14,671,265,625/78,806
  6. Step 6: Final answer
    x = 186,169.40

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.