Finding the Fourth Proportional to 100,642.23, 138,889.42 and 55,323.70
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Solution
The fourth proportional to 100,642.23, 138,889.42 and 55,323.70 is: 76,348.43
Step by Step Solution
- Step 1: Write the proportion equation
100,642.23 : 138,889.42 = 55,323.70 : x - Step 2: Convert to fraction form
100,642.23/138,889.42 = 55,323.70/x - Step 3: Cross multiply
100,642.23x = 138,889.42 × 55,323.70 - Step 4: Simplify right side
100,642.23x = 7,683,876,119.72 - Step 5: Solve for x
x = 7,683,876,119.72/100,642.23 - Step 6: Final answer
x = 76,348.43
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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.