Finding the Fourth Proportional to 128,045.70, 192,241.35 and 81,389.70
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Solution
The fourth proportional to 128,045.70, 192,241.35 and 81,389.70 is: 122,194.39
Step by Step Solution
- Step 1: Write the proportion equation
128,045.70 : 192,241.35 = 81,389.70 : x - Step 2: Convert to fraction form
128,045.70/192,241.35 = 81,389.70/x - Step 3: Cross multiply
128,045.70x = 192,241.35 × 81,389.70 - Step 4: Simplify right side
128,045.70x = 15,646,465,804.10 - Step 5: Solve for x
x = 15,646,465,804.10/128,045.70 - Step 6: Final answer
x = 122,194.39
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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.