Finding the Fourth Proportional to 128,634.48, 177,438.12 and 85,027.28
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Solution
The fourth proportional to 128,634.48, 177,438.12 and 85,027.28 is: 117,286.44
Step by Step Solution
- Step 1: Write the proportion equation
128,634.48 : 177,438.12 = 85,027.28 : x - Step 2: Convert to fraction form
128,634.48/177,438.12 = 85,027.28/x - Step 3: Cross multiply
128,634.48x = 177,438.12 × 85,027.28 - Step 4: Simplify right side
128,634.48x = 15,087,080,711.91 - Step 5: Solve for x
x = 15,087,080,711.91/128,634.48 - Step 6: Final answer
x = 117,286.44
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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.