Finding the Fourth Proportional to 75,875.80, 113,813.70 and 71,987.80
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Solution
The fourth proportional to 75,875.80, 113,813.70 and 71,987.80 is: 107,981.70
Step by Step Solution
- Step 1: Write the proportion equation
75,875.80 : 113,813.70 = 71,987.80 : x - Step 2: Convert to fraction form
75,875.80/113,813.70 = 71,987.80/x - Step 3: Cross multiply
75,875.80x = 113,813.70 × 71,987.80 - Step 4: Simplify right side
75,875.80x = 8,193,197,872.86 - Step 5: Solve for x
x = 8,193,197,872.86/75,875.80 - Step 6: Final answer
x = 107,981.70
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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.