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Finding the Third Proportional to 40,728 and 53,681

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Solution

The third proportional to 40,728 and 53,681 is: 70,753.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728 : 53,681 = 53,681 : x
  2. Step 2: Convert to fraction form
    40,728/53,681 = 53,681/x
  3. Step 3: Cross multiply
    40,728x = 53,681 × 53,681
  4. Step 4: Simplify right side
    40,728x = 2,881,649,761
  5. Step 5: Solve for x
    x = 2,881,649,761/40,728
  6. Step 6: Final answer
    x = 70,753.53

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.