Home / 55,136-87,420

Finding the Third Proportional to 55,136 and 87,420

Calculator

Solution

The third proportional to 55,136 and 87,420 is: 138,607.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,136 : 87,420 = 87,420 : x
  2. Step 2: Convert to fraction form
    55,136/87,420 = 87,420/x
  3. Step 3: Cross multiply
    55,136x = 87,420 × 87,420
  4. Step 4: Simplify right side
    55,136x = 7,642,256,400
  5. Step 5: Solve for x
    x = 7,642,256,400/55,136
  6. Step 6: Final answer
    x = 138,607.38

Related Problems

Find third proportional to 27,568 and 43,710
Half scale
Find third proportional to 110,272 and 174,840
Double scale
Find third proportional to 55,138 and 87,423
Similar ratio
Find third proportional to 82,704 and 131,130
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.