Finding the Fourth Proportional to 155,651.76, 214,783.92 and 87,666.84
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Solution
The fourth proportional to 155,651.76, 214,783.92 and 87,666.84 is: 120,971.50
Step by Step Solution
- Step 1: Write the proportion equation
155,651.76 : 214,783.92 = 87,666.84 : x - Step 2: Convert to fraction form
155,651.76/214,783.92 = 87,666.84/x - Step 3: Cross multiply
155,651.76x = 214,783.92 × 87,666.84 - Step 4: Simplify right side
155,651.76x = 18,829,427,549.21 - Step 5: Solve for x
x = 18,829,427,549.21/155,651.76 - Step 6: Final answer
x = 120,971.50
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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.