Finding the Fourth Proportional to 133,112.75, 183,699.36 and 72,687.20
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Solution
The fourth proportional to 133,112.75, 183,699.36 and 72,687.20 is: 100,310.39
Step by Step Solution
- Step 1: Write the proportion equation
133,112.75 : 183,699.36 = 72,687.20 : x - Step 2: Convert to fraction form
133,112.75/183,699.36 = 72,687.20/x - Step 3: Cross multiply
133,112.75x = 183,699.36 × 72,687.20 - Step 4: Simplify right side
133,112.75x = 13,352,592,120.19 - Step 5: Solve for x
x = 13,352,592,120.19/133,112.75 - Step 6: Final answer
x = 100,310.39
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.