Home / 128,710.68-177,560.70-80,990.34

Finding the Fourth Proportional to 128,710.68, 177,560.70 and 80,990.34

Calculator

Solution

The fourth proportional to 128,710.68, 177,560.70 and 80,990.34 is: 111,728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,710.68 : 177,560.70 = 80,990.34 : x
  2. Step 2: Convert to fraction form
    128,710.68/177,560.70 = 80,990.34/x
  3. Step 3: Cross multiply
    128,710.68x = 177,560.70 × 80,990.34
  4. Step 4: Simplify right side
    128,710.68x = 14,380,701,463.64
  5. Step 5: Solve for x
    x = 14,380,701,463.64/128,710.68
  6. Step 6: Final answer
    x = 111,728.89

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.