Home / 74.81-111.62-69.57

Finding the Fourth Proportional to 74.81, 111.62 and 69.57

Calculator

Solution

The fourth proportional to 74.81, 111.62 and 69.57 is: 103.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.81 : 111.62 = 69.57 : x
  2. Step 2: Convert to fraction form
    74.81/111.62 = 69.57/x
  3. Step 3: Cross multiply
    74.81x = 111.62 × 69.57
  4. Step 4: Simplify right side
    74.81x = 7,765.06
  5. Step 5: Solve for x
    x = 7,765.06/74.81
  6. Step 6: Final answer
    x = 103.80

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.