Finding the Fourth Proportional to 80,880.81, 121,757.96 and 72,743.09
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Solution
The fourth proportional to 80,880.81, 121,757.96 and 72,743.09 is: 109,507.43
Step by Step Solution
- Step 1: Write the proportion equation
80,880.81 : 121,757.96 = 72,743.09 : x - Step 2: Convert to fraction form
80,880.81/121,757.96 = 72,743.09/x - Step 3: Cross multiply
80,880.81x = 121,757.96 × 72,743.09 - Step 4: Simplify right side
80,880.81x = 8,857,049,269.99 - Step 5: Solve for x
x = 8,857,049,269.99/80,880.81 - Step 6: Final answer
x = 109,507.43
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.