Finding the Fourth Proportional to 129,639.79, 178,896.49 and 73,054.81
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Solution
The fourth proportional to 129,639.79, 178,896.49 and 73,054.81 is: 100,812.02
Step by Step Solution
- Step 1: Write the proportion equation
129,639.79 : 178,896.49 = 73,054.81 : x - Step 2: Convert to fraction form
129,639.79/178,896.49 = 73,054.81/x - Step 3: Cross multiply
129,639.79x = 178,896.49 × 73,054.81 - Step 4: Simplify right side
129,639.79x = 13,069,249,086.62 - Step 5: Solve for x
x = 13,069,249,086.62/129,639.79 - Step 6: Final answer
x = 100,812.02
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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.