Home / 128,906.76-177,890.58-72,318

Finding the Fourth Proportional to 128,906.76, 177,890.58 and 72,318

Calculator

Solution

The fourth proportional to 128,906.76, 177,890.58 and 72,318 is: 99,798.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,906.76 : 177,890.58 = 72,318 : x
  2. Step 2: Convert to fraction form
    128,906.76/177,890.58 = 72,318/x
  3. Step 3: Cross multiply
    128,906.76x = 177,890.58 × 72,318
  4. Step 4: Simplify right side
    128,906.76x = 12,864,690,964.44
  5. Step 5: Solve for x
    x = 12,864,690,964.44/128,906.76
  6. Step 6: Final answer
    x = 99,798.42

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.