Home / 124.81-172.22-72.35

Finding the Fourth Proportional to 124.81, 172.22 and 72.35

Calculator

Solution

The fourth proportional to 124.81, 172.22 and 72.35 is: 99.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.81 : 172.22 = 72.35 : x
  2. Step 2: Convert to fraction form
    124.81/172.22 = 72.35/x
  3. Step 3: Cross multiply
    124.81x = 172.22 × 72.35
  4. Step 4: Simplify right side
    124.81x = 12,460.73
  5. Step 5: Solve for x
    x = 12,460.73/124.81
  6. Step 6: Final answer
    x = 99.84

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.