Finding the Fourth Proportional to 128,647.95, 192,990.62 and 39,908.53
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Solution
The fourth proportional to 128,647.95, 192,990.62 and 39,908.53 is: 59,868.59
Step by Step Solution
- Step 1: Write the proportion equation
128,647.95 : 192,990.62 = 39,908.53 : x - Step 2: Convert to fraction form
128,647.95/192,990.62 = 39,908.53/x - Step 3: Cross multiply
128,647.95x = 192,990.62 × 39,908.53 - Step 4: Simplify right side
128,647.95x = 7,701,971,947.99 - Step 5: Solve for x
x = 7,701,971,947.99/128,647.95 - Step 6: Final answer
x = 59,868.59
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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.