Finding the Fourth Proportional to 128,599.31, 177,465.11 and 71,238.45
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Solution
The fourth proportional to 128,599.31, 177,465.11 and 71,238.45 is: 98,307.99
Step by Step Solution
- Step 1: Write the proportion equation
128,599.31 : 177,465.11 = 71,238.45 : x - Step 2: Convert to fraction form
128,599.31/177,465.11 = 71,238.45/x - Step 3: Cross multiply
128,599.31x = 177,465.11 × 71,238.45 - Step 4: Simplify right side
128,599.31x = 12,642,339,543.58 - Step 5: Solve for x
x = 12,642,339,543.58/128,599.31 - Step 6: Final answer
x = 98,307.99
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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.