Finding the Fourth Proportional to 128,423.64, 192,715.65 and 92,403.75
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Solution
The fourth proportional to 128,423.64, 192,715.65 and 92,403.75 is: 138,663.32
Step by Step Solution
- Step 1: Write the proportion equation
128,423.64 : 192,715.65 = 92,403.75 : x - Step 2: Convert to fraction form
128,423.64/192,715.65 = 92,403.75/x - Step 3: Cross multiply
128,423.64x = 192,715.65 × 92,403.75 - Step 4: Simplify right side
128,423.64x = 17,807,648,743.69 - Step 5: Solve for x
x = 17,807,648,743.69/128,423.64 - Step 6: Final answer
x = 138,663.32
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1.5x scale
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.