Home / 149,865.06-206,811.36-81,880.57

Finding the Fourth Proportional to 149,865.06, 206,811.36 and 81,880.57

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Solution

The fourth proportional to 149,865.06, 206,811.36 and 81,880.57 is: 112,993.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,865.06 : 206,811.36 = 81,880.57 : x
  2. Step 2: Convert to fraction form
    149,865.06/206,811.36 = 81,880.57/x
  3. Step 3: Cross multiply
    149,865.06x = 206,811.36 × 81,880.57
  4. Step 4: Simplify right side
    149,865.06x = 16,933,832,039.28
  5. Step 5: Solve for x
    x = 16,933,832,039.28/149,865.06
  6. Step 6: Final answer
    x = 112,993.87

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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.