Finding the Fourth Proportional to 128,440.62, 177,283.71 and 74,736.05
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Solution
The fourth proportional to 128,440.62, 177,283.71 and 74,736.05 is: 103,156.49
Step by Step Solution
- Step 1: Write the proportion equation
128,440.62 : 177,283.71 = 74,736.05 : x - Step 2: Convert to fraction form
128,440.62/177,283.71 = 74,736.05/x - Step 3: Cross multiply
128,440.62x = 177,283.71 × 74,736.05 - Step 4: Simplify right side
128,440.62x = 13,249,483,328.33 - Step 5: Solve for x
x = 13,249,483,328.33/128,440.62 - Step 6: Final answer
x = 103,156.49
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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.