Finding the Fourth Proportional to 154,305.46, 212,961.99 and 86,348.62
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Solution
The fourth proportional to 154,305.46, 212,961.99 and 86,348.62 is: 119,172.54
Step by Step Solution
- Step 1: Write the proportion equation
154,305.46 : 212,961.99 = 86,348.62 : x - Step 2: Convert to fraction form
154,305.46/212,961.99 = 86,348.62/x - Step 3: Cross multiply
154,305.46x = 212,961.99 × 86,348.62 - Step 4: Simplify right side
154,305.46x = 18,388,973,948.95 - Step 5: Solve for x
x = 18,388,973,948.95/154,305.46 - Step 6: Final answer
x = 119,172.54
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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.