Finding the Fourth Proportional to 138,537.29, 207,431.14 and 71,837.21
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Solution
The fourth proportional to 138,537.29, 207,431.14 and 71,837.21 is: 107,561.46
Step by Step Solution
- Step 1: Write the proportion equation
138,537.29 : 207,431.14 = 71,837.21 : x - Step 2: Convert to fraction form
138,537.29/207,431.14 = 71,837.21/x - Step 3: Cross multiply
138,537.29x = 207,431.14 × 71,837.21 - Step 4: Simplify right side
138,537.29x = 14,901,273,282.67 - Step 5: Solve for x
x = 14,901,273,282.67/138,537.29 - Step 6: Final answer
x = 107,561.46
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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.