Finding the Fourth Proportional to 129,275.19, 178,386.17 and 71,905.19
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Solution
The fourth proportional to 129,275.19, 178,386.17 and 71,905.19 is: 99,221.59
Step by Step Solution
- Step 1: Write the proportion equation
129,275.19 : 178,386.17 = 71,905.19 : x - Step 2: Convert to fraction form
129,275.19/178,386.17 = 71,905.19/x - Step 3: Cross multiply
129,275.19x = 178,386.17 × 71,905.19 - Step 4: Simplify right side
129,275.19x = 12,826,890,195.77 - Step 5: Solve for x
x = 12,826,890,195.77/129,275.19 - Step 6: Final answer
x = 99,221.59
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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.