Finding the Fourth Proportional to 81,660,145.80, 122,490,218.70 and 51,427,057.80
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Solution
The fourth proportional to 81,660,145.80, 122,490,218.70 and 51,427,057.80 is: 77,140,586.70
Step by Step Solution
- Step 1: Write the proportion equation
81,660,145.80 : 122,490,218.70 = 51,427,057.80 : x - Step 2: Convert to fraction form
81,660,145.80/122,490,218.70 = 51,427,057.80/x - Step 3: Cross multiply
81,660,145.80x = 122,490,218.70 × 51,427,057.80 - Step 4: Simplify right side
81,660,145.80x = 6,299,311,557,019,541 - Step 5: Solve for x
x = 6,299,311,557,019,541/81,660,145.80 - Step 6: Final answer
x = 77,140,586.70
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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.