Finding the Fourth Proportional to 81,103.87, 121,681.80 and 38,986.99
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Solution
The fourth proportional to 81,103.87, 121,681.80 and 38,986.99 is: 58,492.98
Step by Step Solution
- Step 1: Write the proportion equation
81,103.87 : 121,681.80 = 38,986.99 : x - Step 2: Convert to fraction form
81,103.87/121,681.80 = 38,986.99/x - Step 3: Cross multiply
81,103.87x = 121,681.80 × 38,986.99 - Step 4: Simplify right side
81,103.87x = 4,744,007,119.78 - Step 5: Solve for x
x = 4,744,007,119.78/81,103.87 - Step 6: Final answer
x = 58,492.98
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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.