Finding the Fourth Proportional to 128,386.14, 192,661.82 and 69,262.62
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Solution
The fourth proportional to 128,386.14, 192,661.82 and 69,262.62 is: 103,938.50
Step by Step Solution
- Step 1: Write the proportion equation
128,386.14 : 192,661.82 = 69,262.62 : x - Step 2: Convert to fraction form
128,386.14/192,661.82 = 69,262.62/x - Step 3: Cross multiply
128,386.14x = 192,661.82 × 69,262.62 - Step 4: Simplify right side
128,386.14x = 13,344,262,427.17 - Step 5: Solve for x
x = 13,344,262,427.17/128,386.14 - Step 6: Final answer
x = 103,938.50
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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.