Finding the Fourth Proportional to 138,721.80, 208,082.70 and 115,393.80
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Solution
The fourth proportional to 138,721.80, 208,082.70 and 115,393.80 is: 173,090.70
Step by Step Solution
- Step 1: Write the proportion equation
138,721.80 : 208,082.70 = 115,393.80 : x - Step 2: Convert to fraction form
138,721.80/208,082.70 = 115,393.80/x - Step 3: Cross multiply
138,721.80x = 208,082.70 × 115,393.80 - Step 4: Simplify right side
138,721.80x = 24,011,453,467.26 - Step 5: Solve for x
x = 24,011,453,467.26/138,721.80 - Step 6: Final answer
x = 173,090.70
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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.