Finding the Fourth Proportional to 128,773.86, 192,911.70 and 72,442.80
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Solution
The fourth proportional to 128,773.86, 192,911.70 and 72,442.80 is: 108,524.07
Step by Step Solution
- Step 1: Write the proportion equation
128,773.86 : 192,911.70 = 72,442.80 : x - Step 2: Convert to fraction form
128,773.86/192,911.70 = 72,442.80/x - Step 3: Cross multiply
128,773.86x = 192,911.70 × 72,442.80 - Step 4: Simplify right side
128,773.86x = 13,975,063,700.76 - Step 5: Solve for x
x = 13,975,063,700.76/128,773.86 - Step 6: Final answer
x = 108,524.07
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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.