Finding the Fourth Proportional to 145,729.40, 201,111.54 and 85,305.68
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Solution
The fourth proportional to 145,729.40, 201,111.54 and 85,305.68 is: 117,724.75
Step by Step Solution
- Step 1: Write the proportion equation
145,729.40 : 201,111.54 = 85,305.68 : x - Step 2: Convert to fraction form
145,729.40/201,111.54 = 85,305.68/x - Step 3: Cross multiply
145,729.40x = 201,111.54 × 85,305.68 - Step 4: Simplify right side
145,729.40x = 17,155,956,675.55 - Step 5: Solve for x
x = 17,155,956,675.55/145,729.40 - Step 6: Final answer
x = 117,724.75
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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.