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Finding the Third Proportional to 77,977 and 121,519.50

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Solution

The third proportional to 77,977 and 121,519.50 is: 189,376.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,977 : 121,519.50 = 121,519.50 : x
  2. Step 2: Convert to fraction form
    77,977/121,519.50 = 121,519.50/x
  3. Step 3: Cross multiply
    77,977x = 121,519.50 × 121,519.50
  4. Step 4: Simplify right side
    77,977x = 14,766,988,880.25
  5. Step 5: Solve for x
    x = 14,766,988,880.25/77,977
  6. Step 6: Final answer
    x = 189,376.21

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.