Finding the Fourth Proportional to 80,937.20, 121,405.80 and 68,106.80
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Solution
The fourth proportional to 80,937.20, 121,405.80 and 68,106.80 is: 102,160.20
Step by Step Solution
- Step 1: Write the proportion equation
80,937.20 : 121,405.80 = 68,106.80 : x - Step 2: Convert to fraction form
80,937.20/121,405.80 = 68,106.80/x - Step 3: Cross multiply
80,937.20x = 121,405.80 × 68,106.80 - Step 4: Simplify right side
80,937.20x = 8,268,560,539.44 - Step 5: Solve for x
x = 8,268,560,539.44/80,937.20 - Step 6: Final answer
x = 102,160.20
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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.