Finding the Fourth Proportional to 189,378.84, 261,232.60 and 121,371.72
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Solution
The fourth proportional to 189,378.84, 261,232.60 and 121,371.72 is: 167,422.35
Step by Step Solution
- Step 1: Write the proportion equation
189,378.84 : 261,232.60 = 121,371.72 : x - Step 2: Convert to fraction form
189,378.84/261,232.60 = 121,371.72/x - Step 3: Cross multiply
189,378.84x = 261,232.60 × 121,371.72 - Step 4: Simplify right side
189,378.84x = 31,706,249,982.07 - Step 5: Solve for x
x = 31,706,249,982.07/189,378.84 - Step 6: Final answer
x = 167,422.35
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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.