Finding the Fourth Proportional to 129,217.09, 193,823.20 and 70,426.88
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Solution
The fourth proportional to 129,217.09, 193,823.20 and 70,426.88 is: 105,638.99
Step by Step Solution
- Step 1: Write the proportion equation
129,217.09 : 193,823.20 = 70,426.88 : x - Step 2: Convert to fraction form
129,217.09/193,823.20 = 70,426.88/x - Step 3: Cross multiply
129,217.09x = 193,823.20 × 70,426.88 - Step 4: Simplify right side
129,217.09x = 13,650,363,247.62 - Step 5: Solve for x
x = 13,650,363,247.62/129,217.09 - Step 6: Final answer
x = 105,638.99
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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.