Finding the Fourth Proportional to 112,572.20, 168,636.41 and 91,535.99
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Solution
The fourth proportional to 112,572.20, 168,636.41 and 91,535.99 is: 137,123.56
Step by Step Solution
- Step 1: Write the proportion equation
112,572.20 : 168,636.41 = 91,535.99 : x - Step 2: Convert to fraction form
112,572.20/168,636.41 = 91,535.99/x - Step 3: Cross multiply
112,572.20x = 168,636.41 × 91,535.99 - Step 4: Simplify right side
112,572.20x = 15,436,300,703.31 - Step 5: Solve for x
x = 15,436,300,703.31/112,572.20 - Step 6: Final answer
x = 137,123.56
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.