Finding the Fourth Proportional to 100,984.14, 139,335.66 and 57,960.99
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Solution
The fourth proportional to 100,984.14, 139,335.66 and 57,960.99 is: 79,973.28
Step by Step Solution
- Step 1: Write the proportion equation
100,984.14 : 139,335.66 = 57,960.99 : x - Step 2: Convert to fraction form
100,984.14/139,335.66 = 57,960.99/x - Step 3: Cross multiply
100,984.14x = 139,335.66 × 57,960.99 - Step 4: Simplify right side
100,984.14x = 8,076,032,795.90 - Step 5: Solve for x
x = 8,076,032,795.90/100,984.14 - Step 6: Final answer
x = 79,973.28
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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.