Finding the Fourth Proportional to 128,971.37, 178,067.23 and 98,702.62
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Solution
The fourth proportional to 128,971.37, 178,067.23 and 98,702.62 is: 136,275.99
Step by Step Solution
- Step 1: Write the proportion equation
128,971.37 : 178,067.23 = 98,702.62 : x - Step 2: Convert to fraction form
128,971.37/178,067.23 = 98,702.62/x - Step 3: Cross multiply
128,971.37x = 178,067.23 × 98,702.62 - Step 4: Simplify right side
128,971.37x = 17,575,701,445.22 - Step 5: Solve for x
x = 17,575,701,445.22/128,971.37 - Step 6: Final answer
x = 136,275.99
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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.