Home / 31,421-66,074

Finding the Third Proportional to 31,421 and 66,074

Calculator

Solution

The third proportional to 31,421 and 66,074 is: 138,944.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421 : 66,074 = 66,074 : x
  2. Step 2: Convert to fraction form
    31,421/66,074 = 66,074/x
  3. Step 3: Cross multiply
    31,421x = 66,074 × 66,074
  4. Step 4: Simplify right side
    31,421x = 4,365,773,476
  5. Step 5: Solve for x
    x = 4,365,773,476/31,421
  6. Step 6: Final answer
    x = 138,944.45

Related Problems

Find third proportional to 15,710.50 and 33,037
Half scale
Find third proportional to 62,842 and 132,148
Double scale
Find third proportional to 31,423 and 66,078
Similar ratio
Find third proportional to 47,131.50 and 99,111
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.