Finding the Fourth Proportional to 68,475.60, 102,729.36 and 21,088.80
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Solution
The fourth proportional to 68,475.60, 102,729.36 and 21,088.80 is: 31,638.12
Step by Step Solution
- Step 1: Write the proportion equation
68,475.60 : 102,729.36 = 21,088.80 : x - Step 2: Convert to fraction form
68,475.60/102,729.36 = 21,088.80/x - Step 3: Cross multiply
68,475.60x = 102,729.36 × 21,088.80 - Step 4: Simplify right side
68,475.60x = 2,166,438,927.17 - Step 5: Solve for x
x = 2,166,438,927.17/68,475.60 - Step 6: Final answer
x = 31,638.12
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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.