Home / 129,660-211,718

Finding the Third Proportional to 129,660 and 211,718

Calculator

Solution

The third proportional to 129,660 and 211,718 is: 345,708.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,660 : 211,718 = 211,718 : x
  2. Step 2: Convert to fraction form
    129,660/211,718 = 211,718/x
  3. Step 3: Cross multiply
    129,660x = 211,718 × 211,718
  4. Step 4: Simplify right side
    129,660x = 44,824,511,524
  5. Step 5: Solve for x
    x = 44,824,511,524/129,660
  6. Step 6: Final answer
    x = 345,708.09

Related Problems

Find third proportional to 64,830 and 105,859
Half scale
Find third proportional to 259,320 and 423,436
Double scale
Find third proportional to 129,662 and 211,721
Similar ratio
Find third proportional to 194,490 and 317,577
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.