Finding the Fourth Proportional to 128,832.12, 177,792.84 and 75,108.06
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Solution
The fourth proportional to 128,832.12, 177,792.84 and 75,108.06 is: 103,651.75
Step by Step Solution
- Step 1: Write the proportion equation
128,832.12 : 177,792.84 = 75,108.06 : x - Step 2: Convert to fraction form
128,832.12/177,792.84 = 75,108.06/x - Step 3: Cross multiply
128,832.12x = 177,792.84 × 75,108.06 - Step 4: Simplify right side
128,832.12x = 13,353,675,294.29 - Step 5: Solve for x
x = 13,353,675,294.29/128,832.12 - Step 6: Final answer
x = 103,651.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.