Finding the Fourth Proportional to 81,351.80, 122,027.70 and 71,510.30
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Solution
The fourth proportional to 81,351.80, 122,027.70 and 71,510.30 is: 107,265.45
Step by Step Solution
- Step 1: Write the proportion equation
81,351.80 : 122,027.70 = 71,510.30 : x - Step 2: Convert to fraction form
81,351.80/122,027.70 = 71,510.30/x - Step 3: Cross multiply
81,351.80x = 122,027.70 × 71,510.30 - Step 4: Simplify right side
81,351.80x = 8,726,237,435.31 - Step 5: Solve for x
x = 8,726,237,435.31/81,351.80 - Step 6: Final answer
x = 107,265.45
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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.