Home / 51,240-77,820

Finding the Third Proportional to 51,240 and 77,820

Calculator

Solution

The third proportional to 51,240 and 77,820 is: 118,187.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,240 : 77,820 = 77,820 : x
  2. Step 2: Convert to fraction form
    51,240/77,820 = 77,820/x
  3. Step 3: Cross multiply
    51,240x = 77,820 × 77,820
  4. Step 4: Simplify right side
    51,240x = 6,055,952,400
  5. Step 5: Solve for x
    x = 6,055,952,400/51,240
  6. Step 6: Final answer
    x = 118,187.99

Related Problems

Find third proportional to 25,620 and 38,910
Half scale
Find third proportional to 102,480 and 155,640
Double scale
Find third proportional to 51,242 and 77,823
Similar ratio
Find third proportional to 76,860 and 116,730
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.