Finding the Fourth Proportional to 90,599.68, 135,865.50 and 31,421.08
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Solution
The fourth proportional to 90,599.68, 135,865.50 and 31,421.08 is: 47,119.82
Step by Step Solution
- Step 1: Write the proportion equation
90,599.68 : 135,865.50 = 31,421.08 : x - Step 2: Convert to fraction form
90,599.68/135,865.50 = 31,421.08/x - Step 3: Cross multiply
90,599.68x = 135,865.50 × 31,421.08 - Step 4: Simplify right side
90,599.68x = 4,269,040,744.74 - Step 5: Solve for x
x = 4,269,040,744.74/90,599.68 - Step 6: Final answer
x = 47,119.82
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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.