Finding the Fourth Proportional to 128,655.60, 192,983.84 and 91,102.07
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Solution
The fourth proportional to 128,655.60, 192,983.84 and 91,102.07 is: 136,653.42
Step by Step Solution
- Step 1: Write the proportion equation
128,655.60 : 192,983.84 = 91,102.07 : x - Step 2: Convert to fraction form
128,655.60/192,983.84 = 91,102.07/x - Step 3: Cross multiply
128,655.60x = 192,983.84 × 91,102.07 - Step 4: Simplify right side
128,655.60x = 17,581,227,300.55 - Step 5: Solve for x
x = 17,581,227,300.55/128,655.60 - Step 6: Final answer
x = 136,653.42
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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.