Finding the Fourth Proportional to 143,888.14, 198,690.99 and 90,265.33
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Solution
The fourth proportional to 143,888.14, 198,690.99 and 90,265.33 is: 124,644.79
Step by Step Solution
- Step 1: Write the proportion equation
143,888.14 : 198,690.99 = 90,265.33 : x - Step 2: Convert to fraction form
143,888.14/198,690.99 = 90,265.33/x - Step 3: Cross multiply
143,888.14x = 198,690.99 × 90,265.33 - Step 4: Simplify right side
143,888.14x = 17,934,906,786.92 - Step 5: Solve for x
x = 17,934,906,786.92/143,888.14 - Step 6: Final answer
x = 124,644.79
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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.