Finding the Fourth Proportional to 136,916.09, 188,937.45 and 76,474.70
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Solution
The fourth proportional to 136,916.09, 188,937.45 and 76,474.70 is: 105,531.31
Step by Step Solution
- Step 1: Write the proportion equation
136,916.09 : 188,937.45 = 76,474.70 : x - Step 2: Convert to fraction form
136,916.09/188,937.45 = 76,474.70/x - Step 3: Cross multiply
136,916.09x = 188,937.45 × 76,474.70 - Step 4: Simplify right side
136,916.09x = 14,448,933,862.83 - Step 5: Solve for x
x = 14,448,933,862.83/136,916.09 - Step 6: Final answer
x = 105,531.31
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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.