Finding the Fourth Proportional to 105,221.36, 145,203.09 and 57,474.92
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Solution
The fourth proportional to 105,221.36, 145,203.09 and 57,474.92 is: 79,314.09
Step by Step Solution
- Step 1: Write the proportion equation
105,221.36 : 145,203.09 = 57,474.92 : x - Step 2: Convert to fraction form
105,221.36/145,203.09 = 57,474.92/x - Step 3: Cross multiply
105,221.36x = 145,203.09 × 57,474.92 - Step 4: Simplify right side
105,221.36x = 8,345,535,981.50 - Step 5: Solve for x
x = 8,345,535,981.50/105,221.36 - Step 6: Final answer
x = 79,314.09
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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.