Finding the Fourth Proportional to 90,623.70, 135,935.55 and 84,791.70
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Solution
The fourth proportional to 90,623.70, 135,935.55 and 84,791.70 is: 127,187.55
Step by Step Solution
- Step 1: Write the proportion equation
90,623.70 : 135,935.55 = 84,791.70 : x - Step 2: Convert to fraction form
90,623.70/135,935.55 = 84,791.70/x - Step 3: Cross multiply
90,623.70x = 135,935.55 × 84,791.70 - Step 4: Simplify right side
90,623.70x = 11,526,206,374.94 - Step 5: Solve for x
x = 11,526,206,374.94/90,623.70 - Step 6: Final answer
x = 127,187.55
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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.