Finding the Fourth Proportional to 128,876.18, 177,837.26 and 72,276.62
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Solution
The fourth proportional to 128,876.18, 177,837.26 and 72,276.62 is: 99,735.08
Step by Step Solution
- Step 1: Write the proportion equation
128,876.18 : 177,837.26 = 72,276.62 : x - Step 2: Convert to fraction form
128,876.18/177,837.26 = 72,276.62/x - Step 3: Cross multiply
128,876.18x = 177,837.26 × 72,276.62 - Step 4: Simplify right side
128,876.18x = 12,853,476,062.86 - Step 5: Solve for x
x = 12,853,476,062.86/128,876.18 - Step 6: Final answer
x = 99,735.08
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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.