Finding the Fourth Proportional to 128,845.04, 177,641.56 and 83,442.80
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Solution
The fourth proportional to 128,845.04, 177,641.56 and 83,442.80 is: 115,044.47
Step by Step Solution
- Step 1: Write the proportion equation
128,845.04 : 177,641.56 = 83,442.80 : x - Step 2: Convert to fraction form
128,845.04/177,641.56 = 83,442.80/x - Step 3: Cross multiply
128,845.04x = 177,641.56 × 83,442.80 - Step 4: Simplify right side
128,845.04x = 14,822,909,162.77 - Step 5: Solve for x
x = 14,822,909,162.77/128,845.04 - Step 6: Final answer
x = 115,044.47
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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.