Home / 78,658-171,138

Finding the Third Proportional to 78,658 and 171,138

Calculator

Solution

The third proportional to 78,658 and 171,138 is: 372,348.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,658 : 171,138 = 171,138 : x
  2. Step 2: Convert to fraction form
    78,658/171,138 = 171,138/x
  3. Step 3: Cross multiply
    78,658x = 171,138 × 171,138
  4. Step 4: Simplify right side
    78,658x = 29,288,215,044
  5. Step 5: Solve for x
    x = 29,288,215,044/78,658
  6. Step 6: Final answer
    x = 372,348.84

Related Problems

Find third proportional to 39,329 and 85,569
Half scale
Find third proportional to 157,316 and 342,276
Double scale
Find third proportional to 78,660 and 171,142
Similar ratio
Find third proportional to 117,987 and 256,707
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.