Finding the Fourth Proportional to 121,207.60, 181,811.40 and 79,217.20
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Solution
The fourth proportional to 121,207.60, 181,811.40 and 79,217.20 is: 118,825.80
Step by Step Solution
- Step 1: Write the proportion equation
121,207.60 : 181,811.40 = 79,217.20 : x - Step 2: Convert to fraction form
121,207.60/181,811.40 = 79,217.20/x - Step 3: Cross multiply
121,207.60x = 181,811.40 × 79,217.20 - Step 4: Simplify right side
121,207.60x = 14,402,590,036.08 - Step 5: Solve for x
x = 14,402,590,036.08/121,207.60 - Step 6: Final answer
x = 118,825.80
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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.