Home / 128,898-199,179

Finding the Third Proportional to 128,898 and 199,179

Calculator

Solution

The third proportional to 128,898 and 199,179 is: 307,780.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,898 : 199,179 = 199,179 : x
  2. Step 2: Convert to fraction form
    128,898/199,179 = 199,179/x
  3. Step 3: Cross multiply
    128,898x = 199,179 × 199,179
  4. Step 4: Simplify right side
    128,898x = 39,672,274,041
  5. Step 5: Solve for x
    x = 39,672,274,041/128,898
  6. Step 6: Final answer
    x = 307,780.37

Related Problems

Find third proportional to 64,449 and 99,589.50
Half scale
Find third proportional to 257,796 and 398,358
Double scale
Find third proportional to 128,900 and 199,182
Similar ratio
Find third proportional to 193,347 and 298,768.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.