Finding the Fourth Proportional to 135,772.40, 203,658.42 and 76,581.20
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Solution
The fourth proportional to 135,772.40, 203,658.42 and 76,581.20 is: 114,871.70
Step by Step Solution
- Step 1: Write the proportion equation
135,772.40 : 203,658.42 = 76,581.20 : x - Step 2: Convert to fraction form
135,772.40/203,658.42 = 76,581.20/x - Step 3: Cross multiply
135,772.40x = 203,658.42 × 76,581.20 - Step 4: Simplify right side
135,772.40x = 15,596,406,193.70 - Step 5: Solve for x
x = 15,596,406,193.70/135,772.40 - Step 6: Final answer
x = 114,871.70
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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.