Finding the Fourth Proportional to 129,070.69, 178,118.27 and 71,710.09
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Solution
The fourth proportional to 129,070.69, 178,118.27 and 71,710.09 is: 98,960.32
Step by Step Solution
- Step 1: Write the proportion equation
129,070.69 : 178,118.27 = 71,710.09 : x - Step 2: Convert to fraction form
129,070.69/178,118.27 = 71,710.09/x - Step 3: Cross multiply
129,070.69x = 178,118.27 × 71,710.09 - Step 4: Simplify right side
129,070.69x = 12,772,876,813.79 - Step 5: Solve for x
x = 12,772,876,813.79/129,070.69 - Step 6: Final answer
x = 98,960.32
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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.