Home / 121,860-259,240

Finding the Third Proportional to 121,860 and 259,240

Calculator

Solution

The third proportional to 121,860 and 259,240 is: 551,496.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,860 : 259,240 = 259,240 : x
  2. Step 2: Convert to fraction form
    121,860/259,240 = 259,240/x
  3. Step 3: Cross multiply
    121,860x = 259,240 × 259,240
  4. Step 4: Simplify right side
    121,860x = 67,205,377,600
  5. Step 5: Solve for x
    x = 67,205,377,600/121,860
  6. Step 6: Final answer
    x = 551,496.62

Related Problems

Find third proportional to 60,930 and 129,620
Half scale
Find third proportional to 243,720 and 518,480
Double scale
Find third proportional to 121,862 and 259,244
Similar ratio
Find third proportional to 182,790 and 388,860
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.