Home / 128,722.91-177,632.80-72,130.64

Finding the Fourth Proportional to 128,722.91, 177,632.80 and 72,130.64

Calculator

Solution

The fourth proportional to 128,722.91, 177,632.80 and 72,130.64 is: 99,537.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.91 : 177,632.80 = 72,130.64 : x
  2. Step 2: Convert to fraction form
    128,722.91/177,632.80 = 72,130.64/x
  3. Step 3: Cross multiply
    128,722.91x = 177,632.80 × 72,130.64
  4. Step 4: Simplify right side
    128,722.91x = 12,812,766,480.50
  5. Step 5: Solve for x
    x = 12,812,766,480.50/128,722.91
  6. Step 6: Final answer
    x = 99,537.58

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.