Finding the Fourth Proportional to 138,131.81, 207,197.71 and 91,373.75
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Solution
The fourth proportional to 138,131.81, 207,197.71 and 91,373.75 is: 137,060.62
Step by Step Solution
- Step 1: Write the proportion equation
138,131.81 : 207,197.71 = 91,373.75 : x - Step 2: Convert to fraction form
138,131.81/207,197.71 = 91,373.75/x - Step 3: Cross multiply
138,131.81x = 207,197.71 × 91,373.75 - Step 4: Simplify right side
138,131.81x = 18,932,430,489.69 - Step 5: Solve for x
x = 18,932,430,489.69/138,131.81 - Step 6: Final answer
x = 137,060.62
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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.