Finding the Fourth Proportional to 128,742.88, 193,128.90 and 115,513.96
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Solution
The fourth proportional to 128,742.88, 193,128.90 and 115,513.96 is: 173,284.02
Step by Step Solution
- Step 1: Write the proportion equation
128,742.88 : 193,128.90 = 115,513.96 : x - Step 2: Convert to fraction form
128,742.88/193,128.90 = 115,513.96/x - Step 3: Cross multiply
128,742.88x = 193,128.90 × 115,513.96 - Step 4: Simplify right side
128,742.88x = 22,309,084,029.44 - Step 5: Solve for x
x = 22,309,084,029.44/128,742.88 - Step 6: Final answer
x = 173,284.02
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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.