Finding the Fourth Proportional to 68,512.20, 102,768.30 and 19,257.80
Calculator
Solution
The fourth proportional to 68,512.20, 102,768.30 and 19,257.80 is: 28,886.70
Step by Step Solution
- Step 1: Write the proportion equation
68,512.20 : 102,768.30 = 19,257.80 : x - Step 2: Convert to fraction form
68,512.20/102,768.30 = 19,257.80/x - Step 3: Cross multiply
68,512.20x = 102,768.30 × 19,257.80 - Step 4: Simplify right side
68,512.20x = 1,979,091,367.74 - Step 5: Solve for x
x = 1,979,091,367.74/68,512.20 - Step 6: Final answer
x = 28,886.70
Related Problems
Find fourth proportional to 34,256.10, 51,384.15 and 9,628.90
Half scale
Find fourth proportional to 137,024.40, 205,536.60 and 38,515.60
Double scale
Find fourth proportional to 68,513.20, 102,769.80 and 19,258.80
Similar ratio
Find fourth proportional to 102,768.30, 154,152.45 and 28,886.70
1.5x scale
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.