Finding the Fourth Proportional to 137,648,420.46, 189,959,832.77 and 74,921,488.99
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Solution
The fourth proportional to 137,648,420.46, 189,959,832.77 and 74,921,488.99 is: 103,394,383.11
Step by Step Solution
- Step 1: Write the proportion equation
137,648,420.46 : 189,959,832.77 = 74,921,488.99 : x - Step 2: Convert to fraction form
137,648,420.46/189,959,832.77 = 74,921,488.99/x - Step 3: Cross multiply
137,648,420.46x = 189,959,832.77 × 74,921,488.99 - Step 4: Simplify right side
137,648,420.46x = 14,232,073,519,419,796 - Step 5: Solve for x
x = 14,232,073,519,419,796/137,648,420.46 - Step 6: Final answer
x = 103,394,383.11
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.