Finding the Fourth Proportional to 81,959.15, 122,907.58 and 39,220.71
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Solution
The fourth proportional to 81,959.15, 122,907.58 and 39,220.71 is: 58,816.15
Step by Step Solution
- Step 1: Write the proportion equation
81,959.15 : 122,907.58 = 39,220.71 : x - Step 2: Convert to fraction form
81,959.15/122,907.58 = 39,220.71/x - Step 3: Cross multiply
81,959.15x = 122,907.58 × 39,220.71 - Step 4: Simplify right side
81,959.15x = 4,820,521,993.03 - Step 5: Solve for x
x = 4,820,521,993.03/81,959.15 - Step 6: Final answer
x = 58,816.15
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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.