Finding the Fourth Proportional to 128,278.10, 192,125.55 and 65,875.70
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Solution
The fourth proportional to 128,278.10, 192,125.55 and 65,875.70 is: 98,663.80
Step by Step Solution
- Step 1: Write the proportion equation
128,278.10 : 192,125.55 = 65,875.70 : x - Step 2: Convert to fraction form
128,278.10/192,125.55 = 65,875.70/x - Step 3: Cross multiply
128,278.10x = 192,125.55 × 65,875.70 - Step 4: Simplify right side
128,278.10x = 12,656,405,094.14 - Step 5: Solve for x
x = 12,656,405,094.14/128,278.10 - Step 6: Final answer
x = 98,663.80
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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.