Finding the Fourth Proportional to 81,258.24, 121,830.12 and 31,296.48
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Solution
The fourth proportional to 81,258.24, 121,830.12 and 31,296.48 is: 46,922.67
Step by Step Solution
- Step 1: Write the proportion equation
81,258.24 : 121,830.12 = 31,296.48 : x - Step 2: Convert to fraction form
81,258.24/121,830.12 = 31,296.48/x - Step 3: Cross multiply
81,258.24x = 121,830.12 × 31,296.48 - Step 4: Simplify right side
81,258.24x = 3,812,853,913.98 - Step 5: Solve for x
x = 3,812,853,913.98/81,258.24 - Step 6: Final answer
x = 46,922.67
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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.