Finding the Fourth Proportional to 128,387.14, 177,170.94 and 71,024.98
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Solution
The fourth proportional to 128,387.14, 177,170.94 and 71,024.98 is: 98,012.64
Step by Step Solution
- Step 1: Write the proportion equation
128,387.14 : 177,170.94 = 71,024.98 : x - Step 2: Convert to fraction form
128,387.14/177,170.94 = 71,024.98/x - Step 3: Cross multiply
128,387.14x = 177,170.94 × 71,024.98 - Step 4: Simplify right side
128,387.14x = 12,583,562,470.08 - Step 5: Solve for x
x = 12,583,562,470.08/128,387.14 - Step 6: Final answer
x = 98,012.64
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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.