Home / 109.20-150.64-72.36

Finding the Fourth Proportional to 109.20, 150.64 and 72.36

Calculator

Solution

The fourth proportional to 109.20, 150.64 and 72.36 is: 99.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.20 : 150.64 = 72.36 : x
  2. Step 2: Convert to fraction form
    109.20/150.64 = 72.36/x
  3. Step 3: Cross multiply
    109.20x = 150.64 × 72.36
  4. Step 4: Simplify right side
    109.20x = 10,900.31
  5. Step 5: Solve for x
    x = 10,900.31/109.20
  6. Step 6: Final answer
    x = 99.82

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.