Finding the Fourth Proportional to 128,429.18, 192,682.56 and 38,474.82
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Solution
The fourth proportional to 128,429.18, 192,682.56 and 38,474.82 is: 57,723.85
Step by Step Solution
- Step 1: Write the proportion equation
128,429.18 : 192,682.56 = 38,474.82 : x - Step 2: Convert to fraction form
128,429.18/192,682.56 = 38,474.82/x - Step 3: Cross multiply
128,429.18x = 192,682.56 × 38,474.82 - Step 4: Simplify right side
128,429.18x = 7,413,426,813.14 - Step 5: Solve for x
x = 7,413,426,813.14/128,429.18 - Step 6: Final answer
x = 57,723.85
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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.