Home / 81,864-171,990

Finding the Third Proportional to 81,864 and 171,990

Calculator

Solution

The third proportional to 81,864 and 171,990 is: 361,337.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,864 : 171,990 = 171,990 : x
  2. Step 2: Convert to fraction form
    81,864/171,990 = 171,990/x
  3. Step 3: Cross multiply
    81,864x = 171,990 × 171,990
  4. Step 4: Simplify right side
    81,864x = 29,580,560,100
  5. Step 5: Solve for x
    x = 29,580,560,100/81,864
  6. Step 6: Final answer
    x = 361,337.83

Related Problems

Find third proportional to 40,932 and 85,995
Half scale
Find third proportional to 163,728 and 343,980
Double scale
Find third proportional to 81,866 and 171,994
Similar ratio
Find third proportional to 122,796 and 257,985
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.