Finding the Fourth Proportional to 112,908.63, 155,805.44 and 61,913.19
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Solution
The fourth proportional to 112,908.63, 155,805.44 and 61,913.19 is: 85,435.56
Step by Step Solution
- Step 1: Write the proportion equation
112,908.63 : 155,805.44 = 61,913.19 : x - Step 2: Convert to fraction form
112,908.63/155,805.44 = 61,913.19/x - Step 3: Cross multiply
112,908.63x = 155,805.44 × 61,913.19 - Step 4: Simplify right side
112,908.63x = 9,646,411,500.19 - Step 5: Solve for x
x = 9,646,411,500.19/112,908.63 - Step 6: Final answer
x = 85,435.56
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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.