Finding the Fourth Proportional to 128,991.66, 178,002.50 and 71,634.62
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Solution
The fourth proportional to 128,991.66, 178,002.50 and 71,634.62 is: 98,852.45
Step by Step Solution
- Step 1: Write the proportion equation
128,991.66 : 178,002.50 = 71,634.62 : x - Step 2: Convert to fraction form
128,991.66/178,002.50 = 71,634.62/x - Step 3: Cross multiply
128,991.66x = 178,002.50 × 71,634.62 - Step 4: Simplify right side
128,991.66x = 12,751,141,446.55 - Step 5: Solve for x
x = 12,751,141,446.55/128,991.66 - Step 6: Final answer
x = 98,852.45
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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.