Finding the Fourth Proportional to 153,724.75, 212,140.16 and 86,656.75
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Solution
The fourth proportional to 153,724.75, 212,140.16 and 86,656.75 is: 119,586.32
Step by Step Solution
- Step 1: Write the proportion equation
153,724.75 : 212,140.16 = 86,656.75 : x - Step 2: Convert to fraction form
153,724.75/212,140.16 = 86,656.75/x - Step 3: Cross multiply
153,724.75x = 212,140.16 × 86,656.75 - Step 4: Simplify right side
153,724.75x = 18,383,376,376.80 - Step 5: Solve for x
x = 18,383,376,376.80/153,724.75 - Step 6: Final answer
x = 119,586.32
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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.