Finding the Fourth Proportional to 128,623.93, 192,943.19 and 39,890.05
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Solution
The fourth proportional to 128,623.93, 192,943.19 and 39,890.05 is: 59,837.34
Step by Step Solution
- Step 1: Write the proportion equation
128,623.93 : 192,943.19 = 39,890.05 : x - Step 2: Convert to fraction form
128,623.93/192,943.19 = 39,890.05/x - Step 3: Cross multiply
128,623.93x = 192,943.19 × 39,890.05 - Step 4: Simplify right side
128,623.93x = 7,696,513,496.26 - Step 5: Solve for x
x = 7,696,513,496.26/128,623.93 - Step 6: Final answer
x = 59,837.34
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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.