Finding the Fourth Proportional to 229,289.75, 316,419.86 and 128,687.75
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Solution
The fourth proportional to 229,289.75, 316,419.86 and 128,687.75 is: 177,589.10
Step by Step Solution
- Step 1: Write the proportion equation
229,289.75 : 316,419.86 = 128,687.75 : x - Step 2: Convert to fraction form
229,289.75/316,419.86 = 128,687.75/x - Step 3: Cross multiply
229,289.75x = 316,419.86 × 128,687.75 - Step 4: Simplify right side
229,289.75x = 40,719,359,838.72 - Step 5: Solve for x
x = 40,719,359,838.72/229,289.75 - Step 6: Final answer
x = 177,589.10
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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.