Home / 39,728-86,690

Finding the Third Proportional to 39,728 and 86,690

Calculator

Solution

The third proportional to 39,728 and 86,690 is: 189,165.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,728 : 86,690 = 86,690 : x
  2. Step 2: Convert to fraction form
    39,728/86,690 = 86,690/x
  3. Step 3: Cross multiply
    39,728x = 86,690 × 86,690
  4. Step 4: Simplify right side
    39,728x = 7,515,156,100
  5. Step 5: Solve for x
    x = 7,515,156,100/39,728
  6. Step 6: Final answer
    x = 189,165.23

Related Problems

Find third proportional to 19,864 and 43,345
Half scale
Find third proportional to 79,456 and 173,380
Double scale
Find third proportional to 39,730 and 86,694
Similar ratio
Find third proportional to 59,592 and 130,035
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.