Finding the Fourth Proportional to 81,207.70, 121,811.55 and 39,735.70
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Solution
The fourth proportional to 81,207.70, 121,811.55 and 39,735.70 is: 59,603.55
Step by Step Solution
- Step 1: Write the proportion equation
81,207.70 : 121,811.55 = 39,735.70 : x - Step 2: Convert to fraction form
81,207.70/121,811.55 = 39,735.70/x - Step 3: Cross multiply
81,207.70x = 121,811.55 × 39,735.70 - Step 4: Simplify right side
81,207.70x = 4,840,267,207.34 - Step 5: Solve for x
x = 4,840,267,207.34/81,207.70 - Step 6: Final answer
x = 59,603.55
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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.