Finding the Fourth Proportional to 138,458.56, 207,386.16 and 91,020.08
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Solution
The fourth proportional to 138,458.56, 207,386.16 and 91,020.08 is: 136,331.80
Step by Step Solution
- Step 1: Write the proportion equation
138,458.56 : 207,386.16 = 91,020.08 : x - Step 2: Convert to fraction form
138,458.56/207,386.16 = 91,020.08/x - Step 3: Cross multiply
138,458.56x = 207,386.16 × 91,020.08 - Step 4: Simplify right side
138,458.56x = 18,876,304,874.09 - Step 5: Solve for x
x = 18,876,304,874.09/138,458.56 - Step 6: Final answer
x = 136,331.80
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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.