Finding the Fourth Proportional to 138,409.80, 207,614.84 and 38,570.28
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Solution
The fourth proportional to 138,409.80, 207,614.84 and 38,570.28 is: 57,855.46
Step by Step Solution
- Step 1: Write the proportion equation
138,409.80 : 207,614.84 = 38,570.28 : x - Step 2: Convert to fraction form
138,409.80/207,614.84 = 38,570.28/x - Step 3: Cross multiply
138,409.80x = 207,614.84 × 38,570.28 - Step 4: Simplify right side
138,409.80x = 8,007,762,318.10 - Step 5: Solve for x
x = 8,007,762,318.10/138,409.80 - Step 6: Final answer
x = 57,855.46
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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.