Home / 128,974-199,294

Finding the Third Proportional to 128,974 and 199,294

Calculator

Solution

The third proportional to 128,974 and 199,294 is: 307,954.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,974 : 199,294 = 199,294 : x
  2. Step 2: Convert to fraction form
    128,974/199,294 = 199,294/x
  3. Step 3: Cross multiply
    128,974x = 199,294 × 199,294
  4. Step 4: Simplify right side
    128,974x = 39,718,098,436
  5. Step 5: Solve for x
    x = 39,718,098,436/128,974
  6. Step 6: Final answer
    x = 307,954.30

Related Problems

Find third proportional to 64,487 and 99,647
Half scale
Find third proportional to 257,948 and 398,588
Double scale
Find third proportional to 128,976 and 199,297
Similar ratio
Find third proportional to 193,461 and 298,941
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.