Finding the Fourth Proportional to 138,747.73, 207,786.25 and 79,403.49
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Solution
The fourth proportional to 138,747.73, 207,786.25 and 79,403.49 is: 118,913.32
Step by Step Solution
- Step 1: Write the proportion equation
138,747.73 : 207,786.25 = 79,403.49 : x - Step 2: Convert to fraction form
138,747.73/207,786.25 = 79,403.49/x - Step 3: Cross multiply
138,747.73x = 207,786.25 × 79,403.49 - Step 4: Simplify right side
138,747.73x = 16,498,953,424.01 - Step 5: Solve for x
x = 16,498,953,424.01/138,747.73 - Step 6: Final answer
x = 118,913.32
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.