Home / 81,198-121,387

Finding the Third Proportional to 81,198 and 121,387

Calculator

Solution

The third proportional to 81,198 and 121,387 is: 181,467.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,198 : 121,387 = 121,387 : x
  2. Step 2: Convert to fraction form
    81,198/121,387 = 121,387/x
  3. Step 3: Cross multiply
    81,198x = 121,387 × 121,387
  4. Step 4: Simplify right side
    81,198x = 14,734,803,769
  5. Step 5: Solve for x
    x = 14,734,803,769/81,198
  6. Step 6: Final answer
    x = 181,467.57

Related Problems

Find third proportional to 40,599 and 60,693.50
Half scale
Find third proportional to 162,396 and 242,774
Double scale
Find third proportional to 81,200 and 121,390
Similar ratio
Find third proportional to 121,797 and 182,080.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.