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Finding the Third Proportional to 139,621 and 221,946

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Solution

The third proportional to 139,621 and 221,946 is: 352,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,621 : 221,946 = 221,946 : x
  2. Step 2: Convert to fraction form
    139,621/221,946 = 221,946/x
  3. Step 3: Cross multiply
    139,621x = 221,946 × 221,946
  4. Step 4: Simplify right side
    139,621x = 49,260,026,916
  5. Step 5: Solve for x
    x = 49,260,026,916/139,621
  6. Step 6: Final answer
    x = 352,812.45

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.