Finding the Fourth Proportional to 128,980.61, 193,545.63 and 54,094.08
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Solution
The fourth proportional to 128,980.61, 193,545.63 and 54,094.08 is: 81,172.46
Step by Step Solution
- Step 1: Write the proportion equation
128,980.61 : 193,545.63 = 54,094.08 : x - Step 2: Convert to fraction form
128,980.61/193,545.63 = 54,094.08/x - Step 3: Cross multiply
128,980.61x = 193,545.63 × 54,094.08 - Step 4: Simplify right side
128,980.61x = 10,469,672,792.87 - Step 5: Solve for x
x = 10,469,672,792.87/128,980.61 - Step 6: Final answer
x = 81,172.46
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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.