Finding the Fourth Proportional to 128,455.10, 177,437.45 and 98,609.23
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Solution
The fourth proportional to 128,455.10, 177,437.45 and 98,609.23 is: 136,210.79
Step by Step Solution
- Step 1: Write the proportion equation
128,455.10 : 177,437.45 = 98,609.23 : x - Step 2: Convert to fraction form
128,455.10/177,437.45 = 98,609.23/x - Step 3: Cross multiply
128,455.10x = 177,437.45 × 98,609.23 - Step 4: Simplify right side
128,455.10x = 17,496,970,317.66 - Step 5: Solve for x
x = 17,496,970,317.66/128,455.10 - Step 6: Final answer
x = 136,210.79
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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.