Finding the Fourth Proportional to 145,861.40, 201,154.94 and 99,987.70
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Solution
The fourth proportional to 145,861.40, 201,154.94 and 99,987.70 is: 137,891.32
Step by Step Solution
- Step 1: Write the proportion equation
145,861.40 : 201,154.94 = 99,987.70 : x - Step 2: Convert to fraction form
145,861.40/201,154.94 = 99,987.70/x - Step 3: Cross multiply
145,861.40x = 201,154.94 × 99,987.70 - Step 4: Simplify right side
145,861.40x = 20,113,020,954.58 - Step 5: Solve for x
x = 20,113,020,954.58/145,861.40 - Step 6: Final answer
x = 137,891.32
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1.5x scale
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.