Finding the Fourth Proportional to 128,842.20, 193,781.70 and 115,363.80
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Solution
The fourth proportional to 128,842.20, 193,781.70 and 115,363.80 is: 173,509.87
Step by Step Solution
- Step 1: Write the proportion equation
128,842.20 : 193,781.70 = 115,363.80 : x - Step 2: Convert to fraction form
128,842.20/193,781.70 = 115,363.80/x - Step 3: Cross multiply
128,842.20x = 193,781.70 × 115,363.80 - Step 4: Simplify right side
128,842.20x = 22,355,393,282.46 - Step 5: Solve for x
x = 22,355,393,282.46/128,842.20 - Step 6: Final answer
x = 173,509.87
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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.