Home / 90,204-128,217

Finding the Third Proportional to 90,204 and 128,217

Calculator

Solution

The third proportional to 90,204 and 128,217 is: 182,249.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,204 : 128,217 = 128,217 : x
  2. Step 2: Convert to fraction form
    90,204/128,217 = 128,217/x
  3. Step 3: Cross multiply
    90,204x = 128,217 × 128,217
  4. Step 4: Simplify right side
    90,204x = 16,439,599,089
  5. Step 5: Solve for x
    x = 16,439,599,089/90,204
  6. Step 6: Final answer
    x = 182,249.11

Related Problems

Find third proportional to 45,102 and 64,108.50
Half scale
Find third proportional to 180,408 and 256,434
Double scale
Find third proportional to 90,206 and 128,220
Similar ratio
Find third proportional to 135,306 and 192,325.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.