Finding the Fourth Proportional to 143,629.98, 198,212.85 and 79,972.08
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Solution
The fourth proportional to 143,629.98, 198,212.85 and 79,972.08 is: 110,363.41
Step by Step Solution
- Step 1: Write the proportion equation
143,629.98 : 198,212.85 = 79,972.08 : x - Step 2: Convert to fraction form
143,629.98/198,212.85 = 79,972.08/x - Step 3: Cross multiply
143,629.98x = 198,212.85 × 79,972.08 - Step 4: Simplify right side
143,629.98x = 15,851,493,897.23 - Step 5: Solve for x
x = 15,851,493,897.23/143,629.98 - Step 6: Final answer
x = 110,363.41
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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.