Finding the Fourth Proportional to 128,958.30, 193,437.45 and 99,433.80
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Solution
The fourth proportional to 128,958.30, 193,437.45 and 99,433.80 is: 149,150.70
Step by Step Solution
- Step 1: Write the proportion equation
128,958.30 : 193,437.45 = 99,433.80 : x - Step 2: Convert to fraction form
128,958.30/193,437.45 = 99,433.80/x - Step 3: Cross multiply
128,958.30x = 193,437.45 × 99,433.80 - Step 4: Simplify right side
128,958.30x = 19,234,220,715.81 - Step 5: Solve for x
x = 19,234,220,715.81/128,958.30 - Step 6: Final answer
x = 149,150.70
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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.