Home / 78,520-121,312

Finding the Third Proportional to 78,520 and 121,312

Calculator

Solution

The third proportional to 78,520 and 121,312 is: 187,424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,520 : 121,312 = 121,312 : x
  2. Step 2: Convert to fraction form
    78,520/121,312 = 121,312/x
  3. Step 3: Cross multiply
    78,520x = 121,312 × 121,312
  4. Step 4: Simplify right side
    78,520x = 14,716,601,344
  5. Step 5: Solve for x
    x = 14,716,601,344/78,520
  6. Step 6: Final answer
    x = 187,424.88

Related Problems

Find third proportional to 39,260 and 60,656
Half scale
Find third proportional to 157,040 and 242,624
Double scale
Find third proportional to 78,522 and 121,315
Similar ratio
Find third proportional to 117,780 and 181,968
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.