Home / 85,466.80-128,200.20-72,782.20

Finding the Fourth Proportional to 85,466.80, 128,200.20 and 72,782.20

Calculator

Solution

The fourth proportional to 85,466.80, 128,200.20 and 72,782.20 is: 109,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,466.80 : 128,200.20 = 72,782.20 : x
  2. Step 2: Convert to fraction form
    85,466.80/128,200.20 = 72,782.20/x
  3. Step 3: Cross multiply
    85,466.80x = 128,200.20 × 72,782.20
  4. Step 4: Simplify right side
    85,466.80x = 9,330,692,596.44
  5. Step 5: Solve for x
    x = 9,330,692,596.44/85,466.80
  6. Step 6: Final answer
    x = 109,173.30

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.