Finding the Fourth Proportional to 161,891.40, 242,837.10 and 128,430.30
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Solution
The fourth proportional to 161,891.40, 242,837.10 and 128,430.30 is: 192,645.45
Step by Step Solution
- Step 1: Write the proportion equation
161,891.40 : 242,837.10 = 128,430.30 : x - Step 2: Convert to fraction form
161,891.40/242,837.10 = 128,430.30/x - Step 3: Cross multiply
161,891.40x = 242,837.10 × 128,430.30 - Step 4: Simplify right side
161,891.40x = 31,187,641,604.13 - Step 5: Solve for x
x = 31,187,641,604.13/161,891.40 - Step 6: Final answer
x = 192,645.45
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Double scale
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Similar ratio
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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.