Finding the Fourth Proportional to 90,601.70, 135,902.55 and 84,769.70
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Solution
The fourth proportional to 90,601.70, 135,902.55 and 84,769.70 is: 127,154.55
Step by Step Solution
- Step 1: Write the proportion equation
90,601.70 : 135,902.55 = 84,769.70 : x - Step 2: Convert to fraction form
90,601.70/135,902.55 = 84,769.70/x - Step 3: Cross multiply
90,601.70x = 135,902.55 × 84,769.70 - Step 4: Simplify right side
90,601.70x = 11,520,418,392.74 - Step 5: Solve for x
x = 11,520,418,392.74/90,601.70 - Step 6: Final answer
x = 127,154.55
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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.