Finding the Fourth Proportional to 128,662.40, 193,027.20 and 49,779.20
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Solution
The fourth proportional to 128,662.40, 193,027.20 and 49,779.20 is: 74,681.80
Step by Step Solution
- Step 1: Write the proportion equation
128,662.40 : 193,027.20 = 49,779.20 : x - Step 2: Convert to fraction form
128,662.40/193,027.20 = 49,779.20/x - Step 3: Cross multiply
128,662.40x = 193,027.20 × 49,779.20 - Step 4: Simplify right side
128,662.40x = 9,608,739,594.24 - Step 5: Solve for x
x = 9,608,739,594.24/128,662.40 - Step 6: Final answer
x = 74,681.80
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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.