Finding the Fourth Proportional to 120,121.36, 165,754.79 and 66,397.70
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Solution
The fourth proportional to 120,121.36, 165,754.79 and 66,397.70 is: 91,621.82
Step by Step Solution
- Step 1: Write the proportion equation
120,121.36 : 165,754.79 = 66,397.70 : x - Step 2: Convert to fraction form
120,121.36/165,754.79 = 66,397.70/x - Step 3: Cross multiply
120,121.36x = 165,754.79 × 66,397.70 - Step 4: Simplify right side
120,121.36x = 11,005,737,151.37 - Step 5: Solve for x
x = 11,005,737,151.37/120,121.36 - Step 6: Final answer
x = 91,621.82
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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.