Finding the Fourth Proportional to 203,428.13, 305,142.21 and 78,769.13
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Solution
The fourth proportional to 203,428.13, 305,142.21 and 78,769.13 is: 118,153.70
Step by Step Solution
- Step 1: Write the proportion equation
203,428.13 : 305,142.21 = 78,769.13 : x - Step 2: Convert to fraction form
203,428.13/305,142.21 = 78,769.13/x - Step 3: Cross multiply
203,428.13x = 305,142.21 × 78,769.13 - Step 4: Simplify right side
203,428.13x = 24,035,784,882.27 - Step 5: Solve for x
x = 24,035,784,882.27/203,428.13 - Step 6: Final answer
x = 118,153.70
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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.