Finding the Fourth Proportional to 154,957.18, 213,842.49 and 86,972.79
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Solution
The fourth proportional to 154,957.18, 213,842.49 and 86,972.79 is: 120,023.34
Step by Step Solution
- Step 1: Write the proportion equation
154,957.18 : 213,842.49 = 86,972.79 : x - Step 2: Convert to fraction form
154,957.18/213,842.49 = 86,972.79/x - Step 3: Cross multiply
154,957.18x = 213,842.49 × 86,972.79 - Step 4: Simplify right side
154,957.18x = 18,598,477,975.85 - Step 5: Solve for x
x = 18,598,477,975.85/154,957.18 - Step 6: Final answer
x = 120,023.34
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.