Home / 39,318-87,420

Finding the Third Proportional to 39,318 and 87,420

Calculator

Solution

The third proportional to 39,318 and 87,420 is: 194,370.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,318 : 87,420 = 87,420 : x
  2. Step 2: Convert to fraction form
    39,318/87,420 = 87,420/x
  3. Step 3: Cross multiply
    39,318x = 87,420 × 87,420
  4. Step 4: Simplify right side
    39,318x = 7,642,256,400
  5. Step 5: Solve for x
    x = 7,642,256,400/39,318
  6. Step 6: Final answer
    x = 194,370.43

Related Problems

Find third proportional to 19,659 and 43,710
Half scale
Find third proportional to 78,636 and 174,840
Double scale
Find third proportional to 39,320 and 87,424
Similar ratio
Find third proportional to 58,977 and 131,130
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.