Home / 39,978-87,408

Finding the Third Proportional to 39,978 and 87,408

Calculator

Solution

The third proportional to 39,978 and 87,408 is: 191,109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978 : 87,408 = 87,408 : x
  2. Step 2: Convert to fraction form
    39,978/87,408 = 87,408/x
  3. Step 3: Cross multiply
    39,978x = 87,408 × 87,408
  4. Step 4: Simplify right side
    39,978x = 7,640,158,464
  5. Step 5: Solve for x
    x = 7,640,158,464/39,978
  6. Step 6: Final answer
    x = 191,109.07

Related Problems

Find third proportional to 19,989 and 43,704
Half scale
Find third proportional to 79,956 and 174,816
Double scale
Find third proportional to 39,980 and 87,412
Similar ratio
Find third proportional to 59,967 and 131,112
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.