Finding the Fourth Proportional to 115,636.16, 159,386.96 and 77,382.08
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Solution
The fourth proportional to 115,636.16, 159,386.96 and 77,382.08 is: 106,659.50
Step by Step Solution
- Step 1: Write the proportion equation
115,636.16 : 159,386.96 = 77,382.08 : x - Step 2: Convert to fraction form
115,636.16/159,386.96 = 77,382.08/x - Step 3: Cross multiply
115,636.16x = 159,386.96 × 77,382.08 - Step 4: Simplify right side
115,636.16x = 12,333,694,489.68 - Step 5: Solve for x
x = 12,333,694,489.68/115,636.16 - Step 6: Final answer
x = 106,659.50
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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.