Finding the Fourth Proportional to 128,505.51, 177,356.25 and 74,047.08
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Solution
The fourth proportional to 128,505.51, 177,356.25 and 74,047.08 is: 102,195.71
Step by Step Solution
- Step 1: Write the proportion equation
128,505.51 : 177,356.25 = 74,047.08 : x - Step 2: Convert to fraction form
128,505.51/177,356.25 = 74,047.08/x - Step 3: Cross multiply
128,505.51x = 177,356.25 × 74,047.08 - Step 4: Simplify right side
128,505.51x = 13,132,712,432.25 - Step 5: Solve for x
x = 13,132,712,432.25/128,505.51 - Step 6: Final answer
x = 102,195.71
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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.