Home / 78,017-121,040

Finding the Third Proportional to 78,017 and 121,040

Calculator

Solution

The third proportional to 78,017 and 121,040 is: 187,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,017 : 121,040 = 121,040 : x
  2. Step 2: Convert to fraction form
    78,017/121,040 = 121,040/x
  3. Step 3: Cross multiply
    78,017x = 121,040 × 121,040
  4. Step 4: Simplify right side
    78,017x = 14,650,681,600
  5. Step 5: Solve for x
    x = 14,650,681,600/78,017
  6. Step 6: Final answer
    x = 187,788.32

Related Problems

Find third proportional to 39,008.50 and 60,520
Half scale
Find third proportional to 156,034 and 242,080
Double scale
Find third proportional to 78,019 and 121,043
Similar ratio
Find third proportional to 117,025.50 and 181,560
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.