Finding the Fourth Proportional to 210,971.76, 291,141.12 and 115,478.94
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Solution
The fourth proportional to 210,971.76, 291,141.12 and 115,478.94 is: 159,360.99
Step by Step Solution
- Step 1: Write the proportion equation
210,971.76 : 291,141.12 = 115,478.94 : x - Step 2: Convert to fraction form
210,971.76/291,141.12 = 115,478.94/x - Step 3: Cross multiply
210,971.76x = 291,141.12 × 115,478.94 - Step 4: Simplify right side
210,971.76x = 33,620,667,928.01 - Step 5: Solve for x
x = 33,620,667,928.01/210,971.76 - Step 6: Final answer
x = 159,360.99
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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.