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Finding the Third Proportional to 99,916 and 209,070

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Solution

The third proportional to 99,916 and 209,070 is: 437,470.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,916 : 209,070 = 209,070 : x
  2. Step 2: Convert to fraction form
    99,916/209,070 = 209,070/x
  3. Step 3: Cross multiply
    99,916x = 209,070 × 209,070
  4. Step 4: Simplify right side
    99,916x = 43,710,264,900
  5. Step 5: Solve for x
    x = 43,710,264,900/99,916
  6. Step 6: Final answer
    x = 437,470.12

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.