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Finding the Third Proportional to 50,720 and 78,950

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Solution

The third proportional to 50,720 and 78,950 is: 122,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,720 : 78,950 = 78,950 : x
  2. Step 2: Convert to fraction form
    50,720/78,950 = 78,950/x
  3. Step 3: Cross multiply
    50,720x = 78,950 × 78,950
  4. Step 4: Simplify right side
    50,720x = 6,233,102,500
  5. Step 5: Solve for x
    x = 6,233,102,500/50,720
  6. Step 6: Final answer
    x = 122,892.40

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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.