Finding the Fourth Proportional to 78,028,990.80, 117,043,486.20 and 73,246,021.80
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Solution
The fourth proportional to 78,028,990.80, 117,043,486.20 and 73,246,021.80 is: 109,869,032.70
Step by Step Solution
- Step 1: Write the proportion equation
78,028,990.80 : 117,043,486.20 = 73,246,021.80 : x - Step 2: Convert to fraction form
78,028,990.80/117,043,486.20 = 73,246,021.80/x - Step 3: Cross multiply
78,028,990.80x = 117,043,486.20 × 73,246,021.80 - Step 4: Simplify right side
78,028,990.80x = 8,572,969,741,753,199 - Step 5: Solve for x
x = 8,572,969,741,753,199/78,028,990.80 - Step 6: Final answer
x = 109,869,032.70
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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.