Home / 79.58-109.81-63.25

Finding the Fourth Proportional to 79.58, 109.81 and 63.25

Calculator

Solution

The fourth proportional to 79.58, 109.81 and 63.25 is: 87.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.58 : 109.81 = 63.25 : x
  2. Step 2: Convert to fraction form
    79.58/109.81 = 63.25/x
  3. Step 3: Cross multiply
    79.58x = 109.81 × 63.25
  4. Step 4: Simplify right side
    79.58x = 6,945.48
  5. Step 5: Solve for x
    x = 6,945.48/79.58
  6. Step 6: Final answer
    x = 87.28

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.