Finding the Fourth Proportional to 113,878.10, 157,139.84 and 66,122.12
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Solution
The fourth proportional to 113,878.10, 157,139.84 and 66,122.12 is: 91,241.59
Step by Step Solution
- Step 1: Write the proportion equation
113,878.10 : 157,139.84 = 66,122.12 : x - Step 2: Convert to fraction form
113,878.10/157,139.84 = 66,122.12/x - Step 3: Cross multiply
113,878.10x = 157,139.84 × 66,122.12 - Step 4: Simplify right side
113,878.10x = 10,390,418,240.95 - Step 5: Solve for x
x = 10,390,418,240.95/113,878.10 - Step 6: Final answer
x = 91,241.59
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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.