Home / 78,615-111,129.75

Finding the Third Proportional to 78,615 and 111,129.75

Calculator

Solution

The third proportional to 78,615 and 111,129.75 is: 157,092.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,615 : 111,129.75 = 111,129.75 : x
  2. Step 2: Convert to fraction form
    78,615/111,129.75 = 111,129.75/x
  3. Step 3: Cross multiply
    78,615x = 111,129.75 × 111,129.75
  4. Step 4: Simplify right side
    78,615x = 12,349,821,335.06
  5. Step 5: Solve for x
    x = 12,349,821,335.06/78,615
  6. Step 6: Final answer
    x = 157,092.43

Related Problems

Find third proportional to 39,307.50 and 55,564.88
Half scale
Find third proportional to 157,230 and 222,259.50
Double scale
Find third proportional to 78,617 and 111,133
Similar ratio
Find third proportional to 117,922.50 and 166,694.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.