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Finding the Third Proportional to 105,816 and 163,980

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Solution

The third proportional to 105,816 and 163,980 is: 254,115.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,816 : 163,980 = 163,980 : x
  2. Step 2: Convert to fraction form
    105,816/163,980 = 163,980/x
  3. Step 3: Cross multiply
    105,816x = 163,980 × 163,980
  4. Step 4: Simplify right side
    105,816x = 26,889,440,400
  5. Step 5: Solve for x
    x = 26,889,440,400/105,816
  6. Step 6: Final answer
    x = 254,115.07

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.