Home / 54,900-81,990

Finding the Third Proportional to 54,900 and 81,990

Calculator

Solution

The third proportional to 54,900 and 81,990 is: 122,447.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,900 : 81,990 = 81,990 : x
  2. Step 2: Convert to fraction form
    54,900/81,990 = 81,990/x
  3. Step 3: Cross multiply
    54,900x = 81,990 × 81,990
  4. Step 4: Simplify right side
    54,900x = 6,722,360,100
  5. Step 5: Solve for x
    x = 6,722,360,100/54,900
  6. Step 6: Final answer
    x = 122,447.36

Related Problems

Find third proportional to 27,450 and 40,995
Half scale
Find third proportional to 109,800 and 163,980
Double scale
Find third proportional to 54,902 and 81,993
Similar ratio
Find third proportional to 82,350 and 122,985
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.