Home / 86.28-119.09-53.53

Finding the Fourth Proportional to 86.28, 119.09 and 53.53

Calculator

Solution

The fourth proportional to 86.28, 119.09 and 53.53 is: 73.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.28 : 119.09 = 53.53 : x
  2. Step 2: Convert to fraction form
    86.28/119.09 = 53.53/x
  3. Step 3: Cross multiply
    86.28x = 119.09 × 53.53
  4. Step 4: Simplify right side
    86.28x = 6,374.89
  5. Step 5: Solve for x
    x = 6,374.89/86.28
  6. Step 6: Final answer
    x = 73.89

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.