Finding the Fourth Proportional to 212,895.01, 318,981.03 and 128,477.80
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Solution
The fourth proportional to 212,895.01, 318,981.03 and 128,477.80 is: 192,498.55
Step by Step Solution
- Step 1: Write the proportion equation
212,895.01 : 318,981.03 = 128,477.80 : x - Step 2: Convert to fraction form
212,895.01/318,981.03 = 128,477.80/x - Step 3: Cross multiply
212,895.01x = 318,981.03 × 128,477.80 - Step 4: Simplify right side
212,895.01x = 40,981,980,976.13 - Step 5: Solve for x
x = 40,981,980,976.13/212,895.01 - Step 6: Final answer
x = 192,498.55
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1.5x scale
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.