Finding the Fourth Proportional to 80,938.20, 121,407.30 and 68,107.80
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Solution
The fourth proportional to 80,938.20, 121,407.30 and 68,107.80 is: 102,161.70
Step by Step Solution
- Step 1: Write the proportion equation
80,938.20 : 121,407.30 = 68,107.80 : x - Step 2: Convert to fraction form
80,938.20/121,407.30 = 68,107.80/x - Step 3: Cross multiply
80,938.20x = 121,407.30 × 68,107.80 - Step 4: Simplify right side
80,938.20x = 8,268,784,106.94 - Step 5: Solve for x
x = 8,268,784,106.94/80,938.20 - Step 6: Final answer
x = 102,161.70
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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.