Finding the Fourth Proportional to 77,020.36, 115,590.70 and 39,578.92
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Solution
The fourth proportional to 77,020.36, 115,590.70 and 39,578.92 is: 59,399.29
Step by Step Solution
- Step 1: Write the proportion equation
77,020.36 : 115,590.70 = 39,578.92 : x - Step 2: Convert to fraction form
77,020.36/115,590.70 = 39,578.92/x - Step 3: Cross multiply
77,020.36x = 115,590.70 × 39,578.92 - Step 4: Simplify right side
77,020.36x = 4,574,955,068.04 - Step 5: Solve for x
x = 4,574,955,068.04/77,020.36 - Step 6: Final answer
x = 59,399.29
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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.