Finding the Fourth Proportional to 122,838.21, 169,514.64 and 69,123.06
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Solution
The fourth proportional to 122,838.21, 169,514.64 and 69,123.06 is: 95,388.65
Step by Step Solution
- Step 1: Write the proportion equation
122,838.21 : 169,514.64 = 69,123.06 : x - Step 2: Convert to fraction form
122,838.21/169,514.64 = 69,123.06/x - Step 3: Cross multiply
122,838.21x = 169,514.64 × 69,123.06 - Step 4: Simplify right side
122,838.21x = 11,717,370,631.60 - Step 5: Solve for x
x = 11,717,370,631.60/122,838.21 - Step 6: Final answer
x = 95,388.65
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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.