Finding the Fourth Proportional to 128,465.02, 177,451.16 and 98,619.15
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Solution
The fourth proportional to 128,465.02, 177,451.16 and 98,619.15 is: 136,224.50
Step by Step Solution
- Step 1: Write the proportion equation
128,465.02 : 177,451.16 = 98,619.15 : x - Step 2: Convert to fraction form
128,465.02/177,451.16 = 98,619.15/x - Step 3: Cross multiply
128,465.02x = 177,451.16 × 98,619.15 - Step 4: Simplify right side
128,465.02x = 17,500,082,738.06 - Step 5: Solve for x
x = 17,500,082,738.06/128,465.02 - Step 6: Final answer
x = 136,224.50
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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.