Finding the Fourth Proportional to 121,130.10, 181,803.15 and 71,147.70
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Solution
The fourth proportional to 121,130.10, 181,803.15 and 71,147.70 is: 106,784.99
Step by Step Solution
- Step 1: Write the proportion equation
121,130.10 : 181,803.15 = 71,147.70 : x - Step 2: Convert to fraction form
121,130.10/181,803.15 = 71,147.70/x - Step 3: Cross multiply
121,130.10x = 181,803.15 × 71,147.70 - Step 4: Simplify right side
121,130.10x = 12,934,875,975.26 - Step 5: Solve for x
x = 12,934,875,975.26/121,130.10 - Step 6: Final answer
x = 106,784.99
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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.