Finding the Fourth Proportional to 81,395,209.40, 122,092,814.10 and 20,807,727.80
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Solution
The fourth proportional to 81,395,209.40, 122,092,814.10 and 20,807,727.80 is: 31,211,591.70
Step by Step Solution
- Step 1: Write the proportion equation
81,395,209.40 : 122,092,814.10 = 20,807,727.80 : x - Step 2: Convert to fraction form
81,395,209.40/122,092,814.10 = 20,807,727.80/x - Step 3: Cross multiply
81,395,209.40x = 122,092,814.10 × 20,807,727.80 - Step 4: Simplify right side
81,395,209.40x = 2,540,474,042,128,802 - Step 5: Solve for x
x = 2,540,474,042,128,802/81,395,209.40 - Step 6: Final answer
x = 31,211,591.70
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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.