Finding the Fourth Proportional to 128,711.98, 177,593.52 and 77,732.98
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Solution
The fourth proportional to 128,711.98, 177,593.52 and 77,732.98 is: 107,253.99
Step by Step Solution
- Step 1: Write the proportion equation
128,711.98 : 177,593.52 = 77,732.98 : x - Step 2: Convert to fraction form
128,711.98/177,593.52 = 77,732.98/x - Step 3: Cross multiply
128,711.98x = 177,593.52 × 77,732.98 - Step 4: Simplify right side
128,711.98x = 13,804,873,538.29 - Step 5: Solve for x
x = 13,804,873,538.29/128,711.98 - Step 6: Final answer
x = 107,253.99
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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.