Finding the Fourth Proportional to 128,642.18, 192,981.93 and 39,902.81
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Solution
The fourth proportional to 128,642.18, 192,981.93 and 39,902.81 is: 59,860.00
Step by Step Solution
- Step 1: Write the proportion equation
128,642.18 : 192,981.93 = 39,902.81 : x - Step 2: Convert to fraction form
128,642.18/192,981.93 = 39,902.81/x - Step 3: Cross multiply
128,642.18x = 192,981.93 × 39,902.81 - Step 4: Simplify right side
128,642.18x = 7,700,521,286.22 - Step 5: Solve for x
x = 7,700,521,286.22/128,642.18 - Step 6: Final answer
x = 59,860.00
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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.