Home / 70,116-105,174-20,868

Finding the Fourth Proportional to 70,116, 105,174 and 20,868

Calculator

Solution

The fourth proportional to 70,116, 105,174 and 20,868 is: 31,302

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,116 : 105,174 = 20,868 : x
  2. Step 2: Convert to fraction form
    70,116/105,174 = 20,868/x
  3. Step 3: Cross multiply
    70,116x = 105,174 × 20,868
  4. Step 4: Simplify right side
    70,116x = 2,194,771,032
  5. Step 5: Solve for x
    x = 2,194,771,032/70,116
  6. Step 6: Final answer
    x = 31,302

Related Problems

Find fourth proportional to 35,058, 52,587 and 10,434
Half scale
Find fourth proportional to 140,232, 210,348 and 41,736
Double scale
Find fourth proportional to 70,117, 105,175.50 and 20,869
Similar ratio
Find fourth proportional to 105,174, 157,761 and 31,302
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.