Home / 128,406-170,424

Finding the Third Proportional to 128,406 and 170,424

Calculator

Solution

The third proportional to 128,406 and 170,424 is: 226,191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,406 : 170,424 = 170,424 : x
  2. Step 2: Convert to fraction form
    128,406/170,424 = 170,424/x
  3. Step 3: Cross multiply
    128,406x = 170,424 × 170,424
  4. Step 4: Simplify right side
    128,406x = 29,044,339,776
  5. Step 5: Solve for x
    x = 29,044,339,776/128,406
  6. Step 6: Final answer
    x = 226,191.45

Related Problems

Find third proportional to 64,203 and 85,212
Half scale
Find third proportional to 256,812 and 340,848
Double scale
Find third proportional to 128,408 and 170,427
Similar ratio
Find third proportional to 192,609 and 255,636
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.