Home / 80,658-128,118

Finding the Third Proportional to 80,658 and 128,118

Calculator

Solution

The third proportional to 80,658 and 128,118 is: 203,503.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,658 : 128,118 = 128,118 : x
  2. Step 2: Convert to fraction form
    80,658/128,118 = 128,118/x
  3. Step 3: Cross multiply
    80,658x = 128,118 × 128,118
  4. Step 4: Simplify right side
    80,658x = 16,414,221,924
  5. Step 5: Solve for x
    x = 16,414,221,924/80,658
  6. Step 6: Final answer
    x = 203,503.95

Related Problems

Find third proportional to 40,329 and 64,059
Half scale
Find third proportional to 161,316 and 256,236
Double scale
Find third proportional to 80,660 and 128,121
Similar ratio
Find third proportional to 120,987 and 192,177
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.