Finding the Fourth Proportional to 207,908.10, 311,862.15 and 128,765.70
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Solution
The fourth proportional to 207,908.10, 311,862.15 and 128,765.70 is: 193,148.55
Step by Step Solution
- Step 1: Write the proportion equation
207,908.10 : 311,862.15 = 128,765.70 : x - Step 2: Convert to fraction form
207,908.10/311,862.15 = 128,765.70/x - Step 3: Cross multiply
207,908.10x = 311,862.15 × 128,765.70 - Step 4: Simplify right side
207,908.10x = 40,157,148,048.26 - Step 5: Solve for x
x = 40,157,148,048.26/207,908.10 - Step 6: Final answer
x = 193,148.55
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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.