Finding the Fourth Proportional to 128,781.62, 193,199.79 and 40,032.98
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Solution
The fourth proportional to 128,781.62, 193,199.79 and 40,032.98 is: 60,057.98
Step by Step Solution
- Step 1: Write the proportion equation
128,781.62 : 193,199.79 = 40,032.98 : x - Step 2: Convert to fraction form
128,781.62/193,199.79 = 40,032.98/x - Step 3: Cross multiply
128,781.62x = 193,199.79 × 40,032.98 - Step 4: Simplify right side
128,781.62x = 7,734,363,329.07 - Step 5: Solve for x
x = 7,734,363,329.07/128,781.62 - Step 6: Final answer
x = 60,057.98
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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.