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Finding the Third Proportional to 39,810 and 55,803

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Solution

The third proportional to 39,810 and 55,803 is: 78,220.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,810 : 55,803 = 55,803 : x
  2. Step 2: Convert to fraction form
    39,810/55,803 = 55,803/x
  3. Step 3: Cross multiply
    39,810x = 55,803 × 55,803
  4. Step 4: Simplify right side
    39,810x = 3,113,974,809
  5. Step 5: Solve for x
    x = 3,113,974,809/39,810
  6. Step 6: Final answer
    x = 78,220.92

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.