Home / 129,478-203,451

Finding the Third Proportional to 129,478 and 203,451

Calculator

Solution

The third proportional to 129,478 and 203,451 is: 319,686.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,478 : 203,451 = 203,451 : x
  2. Step 2: Convert to fraction form
    129,478/203,451 = 203,451/x
  3. Step 3: Cross multiply
    129,478x = 203,451 × 203,451
  4. Step 4: Simplify right side
    129,478x = 41,392,309,401
  5. Step 5: Solve for x
    x = 41,392,309,401/129,478
  6. Step 6: Final answer
    x = 319,686.04

Related Problems

Find third proportional to 64,739 and 101,725.50
Half scale
Find third proportional to 258,956 and 406,902
Double scale
Find third proportional to 129,480 and 203,454
Similar ratio
Find third proportional to 194,217 and 305,176.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.