Finding the Fourth Proportional to 128,857.60, 193,432.20 and 76,296.70
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Solution
The fourth proportional to 128,857.60, 193,432.20 and 76,296.70 is: 114,531.38
Step by Step Solution
- Step 1: Write the proportion equation
128,857.60 : 193,432.20 = 76,296.70 : x - Step 2: Convert to fraction form
128,857.60/193,432.20 = 76,296.70/x - Step 3: Cross multiply
128,857.60x = 193,432.20 × 76,296.70 - Step 4: Simplify right side
128,857.60x = 14,758,238,533.74 - Step 5: Solve for x
x = 14,758,238,533.74/128,857.60 - Step 6: Final answer
x = 114,531.38
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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.