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Finding the Third Proportional to 39,136 and 85,780

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Solution

The third proportional to 39,136 and 85,780 is: 188,016.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,136 : 85,780 = 85,780 : x
  2. Step 2: Convert to fraction form
    39,136/85,780 = 85,780/x
  3. Step 3: Cross multiply
    39,136x = 85,780 × 85,780
  4. Step 4: Simplify right side
    39,136x = 7,358,208,400
  5. Step 5: Solve for x
    x = 7,358,208,400/39,136
  6. Step 6: Final answer
    x = 188,016.36

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.