Finding the Fourth Proportional to 112,911.63, 155,809.58 and 61,916.19
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Solution
The fourth proportional to 112,911.63, 155,809.58 and 61,916.19 is: 85,439.70
Step by Step Solution
- Step 1: Write the proportion equation
112,911.63 : 155,809.58 = 61,916.19 : x - Step 2: Convert to fraction form
112,911.63/155,809.58 = 61,916.19/x - Step 3: Cross multiply
112,911.63x = 155,809.58 × 61,916.19 - Step 4: Simplify right side
112,911.63x = 9,647,135,249.52 - Step 5: Solve for x
x = 9,647,135,249.52/112,911.63 - Step 6: Final answer
x = 85,439.70
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1.5x scale
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.