Home / 128,160-199,136

Finding the Third Proportional to 128,160 and 199,136

Calculator

Solution

The third proportional to 128,160 and 199,136 is: 309,419.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,160 : 199,136 = 199,136 : x
  2. Step 2: Convert to fraction form
    128,160/199,136 = 199,136/x
  3. Step 3: Cross multiply
    128,160x = 199,136 × 199,136
  4. Step 4: Simplify right side
    128,160x = 39,655,146,496
  5. Step 5: Solve for x
    x = 39,655,146,496/128,160
  6. Step 6: Final answer
    x = 309,419.06

Related Problems

Find third proportional to 64,080 and 99,568
Half scale
Find third proportional to 256,320 and 398,272
Double scale
Find third proportional to 128,162 and 199,139
Similar ratio
Find third proportional to 192,240 and 298,704
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.