Finding the Fourth Proportional to 86,643.14, 129,979.49 and 38,629.17
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Solution
The fourth proportional to 86,643.14, 129,979.49 and 38,629.17 is: 57,950.34
Step by Step Solution
- Step 1: Write the proportion equation
86,643.14 : 129,979.49 = 38,629.17 : x - Step 2: Convert to fraction form
86,643.14/129,979.49 = 38,629.17/x - Step 3: Cross multiply
86,643.14x = 129,979.49 × 38,629.17 - Step 4: Simplify right side
86,643.14x = 5,020,999,785.54 - Step 5: Solve for x
x = 5,020,999,785.54/86,643.14 - Step 6: Final answer
x = 57,950.34
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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.