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Finding the Third Proportional to 64,812 and 139,740

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Solution

The third proportional to 64,812 and 139,740 is: 301,290.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,812 : 139,740 = 139,740 : x
  2. Step 2: Convert to fraction form
    64,812/139,740 = 139,740/x
  3. Step 3: Cross multiply
    64,812x = 139,740 × 139,740
  4. Step 4: Simplify right side
    64,812x = 19,527,267,600
  5. Step 5: Solve for x
    x = 19,527,267,600/64,812
  6. Step 6: Final answer
    x = 301,290.93

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.