Finding the Fourth Proportional to 128,335.68, 192,530.99 and 38,385.45
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Solution
The fourth proportional to 128,335.68, 192,530.99 and 38,385.45 is: 57,586.39
Step by Step Solution
- Step 1: Write the proportion equation
128,335.68 : 192,530.99 = 38,385.45 : x - Step 2: Convert to fraction form
128,335.68/192,530.99 = 38,385.45/x - Step 3: Cross multiply
128,335.68x = 192,530.99 × 38,385.45 - Step 4: Simplify right side
128,335.68x = 7,390,388,690.10 - Step 5: Solve for x
x = 7,390,388,690.10/128,335.68 - Step 6: Final answer
x = 57,586.39
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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.