Home / 31,420-67,424

Finding the Third Proportional to 31,420 and 67,424

Calculator

Solution

The third proportional to 31,420 and 67,424 is: 144,684.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420 : 67,424 = 67,424 : x
  2. Step 2: Convert to fraction form
    31,420/67,424 = 67,424/x
  3. Step 3: Cross multiply
    31,420x = 67,424 × 67,424
  4. Step 4: Simplify right side
    31,420x = 4,545,995,776
  5. Step 5: Solve for x
    x = 4,545,995,776/31,420
  6. Step 6: Final answer
    x = 144,684.78

Related Problems

Find third proportional to 15,710 and 33,712
Half scale
Find third proportional to 62,840 and 134,848
Double scale
Find third proportional to 31,422 and 67,428
Similar ratio
Find third proportional to 47,130 and 101,136
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.