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Finding the Third Proportional to 39,128 and 60,621

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Solution

The third proportional to 39,128 and 60,621 is: 93,920.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128 : 60,621 = 60,621 : x
  2. Step 2: Convert to fraction form
    39,128/60,621 = 60,621/x
  3. Step 3: Cross multiply
    39,128x = 60,621 × 60,621
  4. Step 4: Simplify right side
    39,128x = 3,674,905,641
  5. Step 5: Solve for x
    x = 3,674,905,641/39,128
  6. Step 6: Final answer
    x = 93,920.10

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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.