Finding the Fourth Proportional to 128,428.68, 192,681.81 and 38,474.31
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Solution
The fourth proportional to 128,428.68, 192,681.81 and 38,474.31 is: 57,723.09
Step by Step Solution
- Step 1: Write the proportion equation
128,428.68 : 192,681.81 = 38,474.31 : x - Step 2: Convert to fraction form
128,428.68/192,681.81 = 38,474.31/x - Step 3: Cross multiply
128,428.68x = 192,681.81 × 38,474.31 - Step 4: Simplify right side
128,428.68x = 7,413,299,689.30 - Step 5: Solve for x
x = 7,413,299,689.30/128,428.68 - Step 6: Final answer
x = 57,723.09
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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.