Finding the Fourth Proportional to 153,805.21, 212,201.50 and 85,811.17
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Solution
The fourth proportional to 153,805.21, 212,201.50 and 85,811.17 is: 118,391.69
Step by Step Solution
- Step 1: Write the proportion equation
153,805.21 : 212,201.50 = 85,811.17 : x - Step 2: Convert to fraction form
153,805.21/212,201.50 = 85,811.17/x - Step 3: Cross multiply
153,805.21x = 212,201.50 × 85,811.17 - Step 4: Simplify right side
153,805.21x = 18,209,258,990.76 - Step 5: Solve for x
x = 18,209,258,990.76/153,805.21 - Step 6: Final answer
x = 118,391.69
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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.