Finding the Fourth Proportional to 136,989.66, 189,022.64 and 76,560.80
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Solution
The fourth proportional to 136,989.66, 189,022.64 and 76,560.80 is: 105,640.99
Step by Step Solution
- Step 1: Write the proportion equation
136,989.66 : 189,022.64 = 76,560.80 : x - Step 2: Convert to fraction form
136,989.66/189,022.64 = 76,560.80/x - Step 3: Cross multiply
136,989.66x = 189,022.64 × 76,560.80 - Step 4: Simplify right side
136,989.66x = 14,471,723,423.92 - Step 5: Solve for x
x = 14,471,723,423.92/136,989.66 - Step 6: Final answer
x = 105,640.99
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1.5x scale
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.