Home / 87,489-135,729

Finding the Third Proportional to 87,489 and 135,729

Calculator

Solution

The third proportional to 87,489 and 135,729 is: 210,567.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,489 : 135,729 = 135,729 : x
  2. Step 2: Convert to fraction form
    87,489/135,729 = 135,729/x
  3. Step 3: Cross multiply
    87,489x = 135,729 × 135,729
  4. Step 4: Simplify right side
    87,489x = 18,422,361,441
  5. Step 5: Solve for x
    x = 18,422,361,441/87,489
  6. Step 6: Final answer
    x = 210,567.74

Related Problems

Find third proportional to 43,744.50 and 67,864.50
Half scale
Find third proportional to 174,978 and 271,458
Double scale
Find third proportional to 87,491 and 135,732
Similar ratio
Find third proportional to 131,233.50 and 203,593.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.