Home / 81,001.78-121,531.83-28,419.46

Finding the Fourth Proportional to 81,001.78, 121,531.83 and 28,419.46

Calculator

Solution

The fourth proportional to 81,001.78, 121,531.83 and 28,419.46 is: 42,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,001.78 : 121,531.83 = 28,419.46 : x
  2. Step 2: Convert to fraction form
    81,001.78/121,531.83 = 28,419.46/x
  3. Step 3: Cross multiply
    81,001.78x = 121,531.83 × 28,419.46
  4. Step 4: Simplify right side
    81,001.78x = 3,453,868,981.41
  5. Step 5: Solve for x
    x = 3,453,868,981.41/81,001.78
  6. Step 6: Final answer
    x = 42,639.42

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.