Finding the Fourth Proportional to 128,385.24, 192,507.36 and 39,614.16
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Solution
The fourth proportional to 128,385.24, 192,507.36 and 39,614.16 is: 59,399.49
Step by Step Solution
- Step 1: Write the proportion equation
128,385.24 : 192,507.36 = 39,614.16 : x - Step 2: Convert to fraction form
128,385.24/192,507.36 = 39,614.16/x - Step 3: Cross multiply
128,385.24x = 192,507.36 × 39,614.16 - Step 4: Simplify right side
128,385.24x = 7,626,017,360.22 - Step 5: Solve for x
x = 7,626,017,360.22/128,385.24 - Step 6: Final answer
x = 59,399.49
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.