Finding the Fourth Proportional to 86,542.24, 129,813.36 and 31,136.80
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Solution
The fourth proportional to 86,542.24, 129,813.36 and 31,136.80 is: 46,705.20
Step by Step Solution
- Step 1: Write the proportion equation
86,542.24 : 129,813.36 = 31,136.80 : x - Step 2: Convert to fraction form
86,542.24/129,813.36 = 31,136.80/x - Step 3: Cross multiply
86,542.24x = 129,813.36 × 31,136.80 - Step 4: Simplify right side
86,542.24x = 4,041,972,627.65 - Step 5: Solve for x
x = 4,041,972,627.65/86,542.24 - Step 6: Final answer
x = 46,705.20
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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.