Finding the Fourth Proportional to 128,427.18, 192,679.56 and 38,472.81
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Solution
The fourth proportional to 128,427.18, 192,679.56 and 38,472.81 is: 57,720.84
Step by Step Solution
- Step 1: Write the proportion equation
128,427.18 : 192,679.56 = 38,472.81 : x - Step 2: Convert to fraction form
128,427.18/192,679.56 = 38,472.81/x - Step 3: Cross multiply
128,427.18x = 192,679.56 × 38,472.81 - Step 4: Simplify right side
128,427.18x = 7,412,924,102.76 - Step 5: Solve for x
x = 7,412,924,102.76/128,427.18 - Step 6: Final answer
x = 57,720.84
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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.