Finding the Fourth Proportional to 138,678.14, 191,375.87 and 75,015.99
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Solution
The fourth proportional to 138,678.14, 191,375.87 and 75,015.99 is: 103,522.08
Step by Step Solution
- Step 1: Write the proportion equation
138,678.14 : 191,375.87 = 75,015.99 : x - Step 2: Convert to fraction form
138,678.14/191,375.87 = 75,015.99/x - Step 3: Cross multiply
138,678.14x = 191,375.87 × 75,015.99 - Step 4: Simplify right side
138,678.14x = 14,356,249,975.08 - Step 5: Solve for x
x = 14,356,249,975.08/138,678.14 - Step 6: Final answer
x = 103,522.08
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.