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Finding the Third Proportional to 121,421 and 190,057

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Solution

The third proportional to 121,421 and 190,057 is: 297,491.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,421 : 190,057 = 190,057 : x
  2. Step 2: Convert to fraction form
    121,421/190,057 = 190,057/x
  3. Step 3: Cross multiply
    121,421x = 190,057 × 190,057
  4. Step 4: Simplify right side
    121,421x = 36,121,663,249
  5. Step 5: Solve for x
    x = 36,121,663,249/121,421
  6. Step 6: Final answer
    x = 297,491.07

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.