Finding the Fourth Proportional to 225,534.12, 311,228.94 and 128,742.96
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Solution
The fourth proportional to 225,534.12, 311,228.94 and 128,742.96 is: 177,660.63
Step by Step Solution
- Step 1: Write the proportion equation
225,534.12 : 311,228.94 = 128,742.96 : x - Step 2: Convert to fraction form
225,534.12/311,228.94 = 128,742.96/x - Step 3: Cross multiply
225,534.12x = 311,228.94 × 128,742.96 - Step 4: Simplify right side
225,534.12x = 40,068,534,973.26 - Step 5: Solve for x
x = 40,068,534,973.26/225,534.12 - Step 6: Final answer
x = 177,660.63
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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.