Home / 71.67-99.03-54.21

Finding the Fourth Proportional to 71.67, 99.03 and 54.21

Calculator

Solution

The fourth proportional to 71.67, 99.03 and 54.21 is: 74.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.67 : 99.03 = 54.21 : x
  2. Step 2: Convert to fraction form
    71.67/99.03 = 54.21/x
  3. Step 3: Cross multiply
    71.67x = 99.03 × 54.21
  4. Step 4: Simplify right side
    71.67x = 5,368.42
  5. Step 5: Solve for x
    x = 5,368.42/71.67
  6. Step 6: Final answer
    x = 74.90

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.