Finding the Fourth Proportional to 78,557.76, 117,836.64 and 55,288.08
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Solution
The fourth proportional to 78,557.76, 117,836.64 and 55,288.08 is: 82,932.12
Step by Step Solution
- Step 1: Write the proportion equation
78,557.76 : 117,836.64 = 55,288.08 : x - Step 2: Convert to fraction form
78,557.76/117,836.64 = 55,288.08/x - Step 3: Cross multiply
78,557.76x = 117,836.64 × 55,288.08 - Step 4: Simplify right side
78,557.76x = 6,514,961,579.25 - Step 5: Solve for x
x = 6,514,961,579.25/78,557.76 - Step 6: Final answer
x = 82,932.12
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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.