Finding the Fourth Proportional to 135,228.80, 202,967.20 and 68,715.20
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Solution
The fourth proportional to 135,228.80, 202,967.20 and 68,715.20 is: 103,135.81
Step by Step Solution
- Step 1: Write the proportion equation
135,228.80 : 202,967.20 = 68,715.20 : x - Step 2: Convert to fraction form
135,228.80/202,967.20 = 68,715.20/x - Step 3: Cross multiply
135,228.80x = 202,967.20 × 68,715.20 - Step 4: Simplify right side
135,228.80x = 13,946,931,741.44 - Step 5: Solve for x
x = 13,946,931,741.44/135,228.80 - Step 6: Final answer
x = 103,135.81
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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.