Finding the Fourth Proportional to 78,059.05, 107,724.09 and 47,838.53
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Solution
The fourth proportional to 78,059.05, 107,724.09 and 47,838.53 is: 66,018.77
Step by Step Solution
- Step 1: Write the proportion equation
78,059.05 : 107,724.09 = 47,838.53 : x - Step 2: Convert to fraction form
78,059.05/107,724.09 = 47,838.53/x - Step 3: Cross multiply
78,059.05x = 107,724.09 × 47,838.53 - Step 4: Simplify right side
78,059.05x = 5,153,361,976.53 - Step 5: Solve for x
x = 5,153,361,976.53/78,059.05 - Step 6: Final answer
x = 66,018.77
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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.