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Finding the Third Proportional to 55,490 and 122,291

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Solution

The third proportional to 55,490 and 122,291 is: 269,509.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,490 : 122,291 = 122,291 : x
  2. Step 2: Convert to fraction form
    55,490/122,291 = 122,291/x
  3. Step 3: Cross multiply
    55,490x = 122,291 × 122,291
  4. Step 4: Simplify right side
    55,490x = 14,955,088,681
  5. Step 5: Solve for x
    x = 14,955,088,681/55,490
  6. Step 6: Final answer
    x = 269,509.62

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.