Finding the Fourth Proportional to 138,716.70, 207,783.45 and 115,388.70
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Solution
The fourth proportional to 138,716.70, 207,783.45 and 115,388.70 is: 172,840.49
Step by Step Solution
- Step 1: Write the proportion equation
138,716.70 : 207,783.45 = 115,388.70 : x - Step 2: Convert to fraction form
138,716.70/207,783.45 = 115,388.70/x - Step 3: Cross multiply
138,716.70x = 207,783.45 × 115,388.70 - Step 4: Simplify right side
138,716.70x = 23,975,862,177.02 - Step 5: Solve for x
x = 23,975,862,177.02/138,716.70 - Step 6: Final answer
x = 172,840.49
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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.