Finding the Fourth Proportional to 68,628.40, 102,946.27 and 21,276.21
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Solution
The fourth proportional to 68,628.40, 102,946.27 and 21,276.21 is: 31,915.45
Step by Step Solution
- Step 1: Write the proportion equation
68,628.40 : 102,946.27 = 21,276.21 : x - Step 2: Convert to fraction form
68,628.40/102,946.27 = 21,276.21/x - Step 3: Cross multiply
68,628.40x = 102,946.27 × 21,276.21 - Step 4: Simplify right side
68,628.40x = 2,190,306,459.24 - Step 5: Solve for x
x = 2,190,306,459.24/68,628.40 - Step 6: Final answer
x = 31,915.45
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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.