Home / 128,187-199,000

Finding the Third Proportional to 128,187 and 199,000

Calculator

Solution

The third proportional to 128,187 and 199,000 is: 308,931.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,187 : 199,000 = 199,000 : x
  2. Step 2: Convert to fraction form
    128,187/199,000 = 199,000/x
  3. Step 3: Cross multiply
    128,187x = 199,000 × 199,000
  4. Step 4: Simplify right side
    128,187x = 39,601,000,000
  5. Step 5: Solve for x
    x = 39,601,000,000/128,187
  6. Step 6: Final answer
    x = 308,931.48

Related Problems

Find third proportional to 64,093.50 and 99,500
Half scale
Find third proportional to 256,374 and 398,000
Double scale
Find third proportional to 128,189 and 199,003
Similar ratio
Find third proportional to 192,280.50 and 298,500
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.