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Finding the Third Proportional to 60,372 and 129,990

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Solution

The third proportional to 60,372 and 129,990 is: 279,888.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,372 : 129,990 = 129,990 : x
  2. Step 2: Convert to fraction form
    60,372/129,990 = 129,990/x
  3. Step 3: Cross multiply
    60,372x = 129,990 × 129,990
  4. Step 4: Simplify right side
    60,372x = 16,897,400,100
  5. Step 5: Solve for x
    x = 16,897,400,100/60,372
  6. Step 6: Final answer
    x = 279,888.03

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.