Home / 78,719.12-118,119.40-31,324

Finding the Fourth Proportional to 78,719.12, 118,119.40 and 31,324

Calculator

Solution

The fourth proportional to 78,719.12, 118,119.40 and 31,324 is: 47,002.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.12 : 118,119.40 = 31,324 : x
  2. Step 2: Convert to fraction form
    78,719.12/118,119.40 = 31,324/x
  3. Step 3: Cross multiply
    78,719.12x = 118,119.40 × 31,324
  4. Step 4: Simplify right side
    78,719.12x = 3,699,972,085.60
  5. Step 5: Solve for x
    x = 3,699,972,085.60/78,719.12
  6. Step 6: Final answer
    x = 47,002.20

Related Problems

Find fourth proportional to 39,359.56, 59,059.70 and 15,662
Half scale
Find fourth proportional to 157,438.24, 236,238.80 and 62,648
Double scale
Find fourth proportional to 78,720.12, 118,120.90 and 31,325
Similar ratio
Find fourth proportional to 118,078.68, 177,179.10 and 46,986
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.