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Finding the Third Proportional to 99,664 and 154,420

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Solution

The third proportional to 99,664 and 154,420 is: 239,259.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664 : 154,420 = 154,420 : x
  2. Step 2: Convert to fraction form
    99,664/154,420 = 154,420/x
  3. Step 3: Cross multiply
    99,664x = 154,420 × 154,420
  4. Step 4: Simplify right side
    99,664x = 23,845,536,400
  5. Step 5: Solve for x
    x = 23,845,536,400/99,664
  6. Step 6: Final answer
    x = 239,259.28

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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.