Home / 121,451-256,105

Finding the Third Proportional to 121,451 and 256,105

Calculator

Solution

The third proportional to 121,451 and 256,105 is: 540,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,451 : 256,105 = 256,105 : x
  2. Step 2: Convert to fraction form
    121,451/256,105 = 256,105/x
  3. Step 3: Cross multiply
    121,451x = 256,105 × 256,105
  4. Step 4: Simplify right side
    121,451x = 65,589,771,025
  5. Step 5: Solve for x
    x = 65,589,771,025/121,451
  6. Step 6: Final answer
    x = 540,051.30

Related Problems

Find third proportional to 60,725.50 and 128,052.50
Half scale
Find third proportional to 242,902 and 512,210
Double scale
Find third proportional to 121,453 and 256,109
Similar ratio
Find third proportional to 182,176.50 and 384,157.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.