Home / 31,176-68,310

Finding the Third Proportional to 31,176 and 68,310

Calculator

Solution

The third proportional to 31,176 and 68,310 is: 149,674.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,176 : 68,310 = 68,310 : x
  2. Step 2: Convert to fraction form
    31,176/68,310 = 68,310/x
  3. Step 3: Cross multiply
    31,176x = 68,310 × 68,310
  4. Step 4: Simplify right side
    31,176x = 4,666,256,100
  5. Step 5: Solve for x
    x = 4,666,256,100/31,176
  6. Step 6: Final answer
    x = 149,674.62

Related Problems

Find third proportional to 15,588 and 34,155
Half scale
Find third proportional to 62,352 and 136,620
Double scale
Find third proportional to 31,178 and 68,314
Similar ratio
Find third proportional to 46,764 and 102,465
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.