Finding the Fourth Proportional to 138,129.90, 207,174.34 and 38,279.68
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Solution
The fourth proportional to 138,129.90, 207,174.34 and 38,279.68 is: 57,413.84
Step by Step Solution
- Step 1: Write the proportion equation
138,129.90 : 207,174.34 = 38,279.68 : x - Step 2: Convert to fraction form
138,129.90/207,174.34 = 38,279.68/x - Step 3: Cross multiply
138,129.90x = 207,174.34 × 38,279.68 - Step 4: Simplify right side
138,129.90x = 7,930,567,439.41 - Step 5: Solve for x
x = 7,930,567,439.41/138,129.90 - Step 6: Final answer
x = 57,413.84
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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.