Finding the Fourth Proportional to 155,390.61, 214,378.31 and 87,391.99
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Solution
The fourth proportional to 155,390.61, 214,378.31 and 87,391.99 is: 120,566.78
Step by Step Solution
- Step 1: Write the proportion equation
155,390.61 : 214,378.31 = 87,391.99 : x - Step 2: Convert to fraction form
155,390.61/214,378.31 = 87,391.99/x - Step 3: Cross multiply
155,390.61x = 214,378.31 × 87,391.99 - Step 4: Simplify right side
155,390.61x = 18,734,946,051.85 - Step 5: Solve for x
x = 18,734,946,051.85/155,390.61 - Step 6: Final answer
x = 120,566.78
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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.