Home / 82.64-124.70-79.31

Finding the Fourth Proportional to 82.64, 124.70 and 79.31

Calculator

Solution

The fourth proportional to 82.64, 124.70 and 79.31 is: 119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.64 : 124.70 = 79.31 : x
  2. Step 2: Convert to fraction form
    82.64/124.70 = 79.31/x
  3. Step 3: Cross multiply
    82.64x = 124.70 × 79.31
  4. Step 4: Simplify right side
    82.64x = 9,889.96
  5. Step 5: Solve for x
    x = 9,889.96/82.64
  6. Step 6: Final answer
    x = 119.68

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.