Finding the Fourth Proportional to 145,781.28, 201,178.70 and 84,539.40
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Solution
The fourth proportional to 145,781.28, 201,178.70 and 84,539.40 is: 116,664.68
Step by Step Solution
- Step 1: Write the proportion equation
145,781.28 : 201,178.70 = 84,539.40 : x - Step 2: Convert to fraction form
145,781.28/201,178.70 = 84,539.40/x - Step 3: Cross multiply
145,781.28x = 201,178.70 × 84,539.40 - Step 4: Simplify right side
145,781.28x = 17,007,526,168.08 - Step 5: Solve for x
x = 17,007,526,168.08/145,781.28 - Step 6: Final answer
x = 116,664.68
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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.