Finding the Fourth Proportional to 128,655.65, 192,983.94 and 91,102.13
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Solution
The fourth proportional to 128,655.65, 192,983.94 and 91,102.13 is: 136,653.52
Step by Step Solution
- Step 1: Write the proportion equation
128,655.65 : 192,983.94 = 91,102.13 : x - Step 2: Convert to fraction form
128,655.65/192,983.94 = 91,102.13/x - Step 3: Cross multiply
128,655.65x = 192,983.94 × 91,102.13 - Step 4: Simplify right side
128,655.65x = 17,581,247,989.79 - Step 5: Solve for x
x = 17,581,247,989.79/128,655.65 - Step 6: Final answer
x = 136,653.52
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.