Finding the Fourth Proportional to 3,887,703,141.20, 5,831,554,711.80 and 979,657,989.20
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Solution
The fourth proportional to 3,887,703,141.20, 5,831,554,711.80 and 979,657,989.20 is: 1,469,486,983.80
Step by Step Solution
- Step 1: Write the proportion equation
3,887,703,141.20 : 5,831,554,711.80 = 979,657,989.20 : x - Step 2: Convert to fraction form
3,887,703,141.20/5,831,554,711.80 = 979,657,989.20/x - Step 3: Cross multiply
3,887,703,141.20x = 5,831,554,711.80 × 979,657,989.20 - Step 4: Simplify right side
3,887,703,141.20x = 5,712,929,162,871,774,208 - Step 5: Solve for x
x = 5,712,929,162,871,774,208/3,887,703,141.20 - Step 6: Final answer
x = 1,469,486,983.80
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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.