Finding the Fourth Proportional to 100,668.44, 138,922.72 and 55,351.05
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Solution
The fourth proportional to 100,668.44, 138,922.72 and 55,351.05 is: 76,384.60
Step by Step Solution
- Step 1: Write the proportion equation
100,668.44 : 138,922.72 = 55,351.05 : x - Step 2: Convert to fraction form
100,668.44/138,922.72 = 55,351.05/x - Step 3: Cross multiply
100,668.44x = 138,922.72 × 55,351.05 - Step 4: Simplify right side
100,668.44x = 7,689,518,282.48 - Step 5: Solve for x
x = 7,689,518,282.48/100,668.44 - Step 6: Final answer
x = 76,384.60
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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.