Home / 31,428-66,087

Finding the Third Proportional to 31,428 and 66,087

Calculator

Solution

The third proportional to 31,428 and 66,087 is: 138,968.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428 : 66,087 = 66,087 : x
  2. Step 2: Convert to fraction form
    31,428/66,087 = 66,087/x
  3. Step 3: Cross multiply
    31,428x = 66,087 × 66,087
  4. Step 4: Simplify right side
    31,428x = 4,367,491,569
  5. Step 5: Solve for x
    x = 4,367,491,569/31,428
  6. Step 6: Final answer
    x = 138,968.17

Related Problems

Find third proportional to 15,714 and 33,043.50
Half scale
Find third proportional to 62,856 and 132,174
Double scale
Find third proportional to 31,430 and 66,091
Similar ratio
Find third proportional to 47,142 and 99,130.50
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.