Finding the Fourth Proportional to 81,408.73, 121,902.80 and 56,186.09
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Solution
The fourth proportional to 81,408.73, 121,902.80 and 56,186.09 is: 84,134.00
Step by Step Solution
- Step 1: Write the proportion equation
81,408.73 : 121,902.80 = 56,186.09 : x - Step 2: Convert to fraction form
81,408.73/121,902.80 = 56,186.09/x - Step 3: Cross multiply
81,408.73x = 121,902.80 × 56,186.09 - Step 4: Simplify right side
81,408.73x = 6,849,241,692.05 - Step 5: Solve for x
x = 6,849,241,692.05/81,408.73 - Step 6: Final answer
x = 84,134.00
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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.