Finding the Fourth Proportional to 128,368.73, 177,157.02 and 71,780.09
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Solution
The fourth proportional to 128,368.73, 177,157.02 and 71,780.09 is: 99,061.09
Step by Step Solution
- Step 1: Write the proportion equation
128,368.73 : 177,157.02 = 71,780.09 : x - Step 2: Convert to fraction form
128,368.73/177,157.02 = 71,780.09/x - Step 3: Cross multiply
128,368.73x = 177,157.02 × 71,780.09 - Step 4: Simplify right side
128,368.73x = 12,716,346,839.73 - Step 5: Solve for x
x = 12,716,346,839.73/128,368.73 - Step 6: Final answer
x = 99,061.09
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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.