Home / 98.80-148.02-66.68

Finding the Fourth Proportional to 98.80, 148.02 and 66.68

Calculator

Solution

The fourth proportional to 98.80, 148.02 and 66.68 is: 99.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.80 : 148.02 = 66.68 : x
  2. Step 2: Convert to fraction form
    98.80/148.02 = 66.68/x
  3. Step 3: Cross multiply
    98.80x = 148.02 × 66.68
  4. Step 4: Simplify right side
    98.80x = 9,869.97
  5. Step 5: Solve for x
    x = 9,869.97/98.80
  6. Step 6: Final answer
    x = 99.90

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.