Finding the Fourth Proportional to 100,348.14, 138,481.99 and 55,030.26
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Solution
The fourth proportional to 100,348.14, 138,481.99 and 55,030.26 is: 75,942.61
Step by Step Solution
- Step 1: Write the proportion equation
100,348.14 : 138,481.99 = 55,030.26 : x - Step 2: Convert to fraction form
100,348.14/138,481.99 = 55,030.26/x - Step 3: Cross multiply
100,348.14x = 138,481.99 × 55,030.26 - Step 4: Simplify right side
100,348.14x = 7,620,699,915.02 - Step 5: Solve for x
x = 7,620,699,915.02/100,348.14 - Step 6: Final answer
x = 75,942.61
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1.5x scale
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.