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Finding the Third Proportional to 19,915 and 43,137

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Solution

The third proportional to 19,915 and 43,137 is: 93,437.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915 : 43,137 = 43,137 : x
  2. Step 2: Convert to fraction form
    19,915/43,137 = 43,137/x
  3. Step 3: Cross multiply
    19,915x = 43,137 × 43,137
  4. Step 4: Simplify right side
    19,915x = 1,860,800,769
  5. Step 5: Solve for x
    x = 1,860,800,769/19,915
  6. Step 6: Final answer
    x = 93,437.15

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.