Finding the Fourth Proportional to 74,959.72, 103,434.43 and 48,138.56
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Solution
The fourth proportional to 74,959.72, 103,434.43 and 48,138.56 is: 66,424.80
Step by Step Solution
- Step 1: Write the proportion equation
74,959.72 : 103,434.43 = 48,138.56 : x - Step 2: Convert to fraction form
74,959.72/103,434.43 = 48,138.56/x - Step 3: Cross multiply
74,959.72x = 103,434.43 × 48,138.56 - Step 4: Simplify right side
74,959.72x = 4,979,184,514.62 - Step 5: Solve for x
x = 4,979,184,514.62/74,959.72 - Step 6: Final answer
x = 66,424.80
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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.