Finding the Fourth Proportional to 128,503.14, 177,318.68 and 71,138.13
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Solution
The fourth proportional to 128,503.14, 177,318.68 and 71,138.13 is: 98,161.95
Step by Step Solution
- Step 1: Write the proportion equation
128,503.14 : 177,318.68 = 71,138.13 : x - Step 2: Convert to fraction form
128,503.14/177,318.68 = 71,138.13/x - Step 3: Cross multiply
128,503.14x = 177,318.68 × 71,138.13 - Step 4: Simplify right side
128,503.14x = 12,614,118,953.58 - Step 5: Solve for x
x = 12,614,118,953.58/128,503.14 - Step 6: Final answer
x = 98,161.95
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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.