Home / 78,916-122,657

Finding the Third Proportional to 78,916 and 122,657

Calculator

Solution

The third proportional to 78,916 and 122,657 is: 190,642.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,916 : 122,657 = 122,657 : x
  2. Step 2: Convert to fraction form
    78,916/122,657 = 122,657/x
  3. Step 3: Cross multiply
    78,916x = 122,657 × 122,657
  4. Step 4: Simplify right side
    78,916x = 15,044,739,649
  5. Step 5: Solve for x
    x = 15,044,739,649/78,916
  6. Step 6: Final answer
    x = 190,642.45

Related Problems

Find third proportional to 39,458 and 61,328.50
Half scale
Find third proportional to 157,832 and 245,314
Double scale
Find third proportional to 78,918 and 122,660
Similar ratio
Find third proportional to 118,374 and 183,985.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.