Finding the Fourth Proportional to 128,915.70, 193,373.55 and 34,145.70
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Solution
The fourth proportional to 128,915.70, 193,373.55 and 34,145.70 is: 51,218.55
Step by Step Solution
- Step 1: Write the proportion equation
128,915.70 : 193,373.55 = 34,145.70 : x - Step 2: Convert to fraction form
128,915.70/193,373.55 = 34,145.70/x - Step 3: Cross multiply
128,915.70x = 193,373.55 × 34,145.70 - Step 4: Simplify right side
128,915.70x = 6,602,875,226.24 - Step 5: Solve for x
x = 6,602,875,226.24/128,915.70 - Step 6: Final answer
x = 51,218.55
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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.