Finding the Fourth Proportional to 231,012.02, 318,787.05 and 129,036.99
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Solution
The fourth proportional to 231,012.02, 318,787.05 and 129,036.99 is: 178,065.72
Step by Step Solution
- Step 1: Write the proportion equation
231,012.02 : 318,787.05 = 129,036.99 : x - Step 2: Convert to fraction form
231,012.02/318,787.05 = 129,036.99/x - Step 3: Cross multiply
231,012.02x = 318,787.05 × 129,036.99 - Step 4: Simplify right side
231,012.02x = 41,135,321,382.98 - Step 5: Solve for x
x = 41,135,321,382.98/231,012.02 - Step 6: Final answer
x = 178,065.72
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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.