Finding the Fourth Proportional to 129,032.92, 178,060.84 and 72,446.68
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Solution
The fourth proportional to 129,032.92, 178,060.84 and 72,446.68 is: 99,973.84
Step by Step Solution
- Step 1: Write the proportion equation
129,032.92 : 178,060.84 = 72,446.68 : x - Step 2: Convert to fraction form
129,032.92/178,060.84 = 72,446.68/x - Step 3: Cross multiply
129,032.92x = 178,060.84 × 72,446.68 - Step 4: Simplify right side
129,032.92x = 12,899,916,696.01 - Step 5: Solve for x
x = 12,899,916,696.01/129,032.92 - Step 6: Final answer
x = 99,973.84
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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.