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Finding the Third Proportional to 64,728 and 99,972

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Solution

The third proportional to 64,728 and 99,972 is: 154,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,728 : 99,972 = 99,972 : x
  2. Step 2: Convert to fraction form
    64,728/99,972 = 99,972/x
  3. Step 3: Cross multiply
    64,728x = 99,972 × 99,972
  4. Step 4: Simplify right side
    64,728x = 9,994,400,784
  5. Step 5: Solve for x
    x = 9,994,400,784/64,728
  6. Step 6: Final answer
    x = 154,406.14

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.