Finding the Fourth Proportional to 145,885.79, 201,322.37 and 78,817.79
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Solution
The fourth proportional to 145,885.79, 201,322.37 and 78,817.79 is: 108,768.54
Step by Step Solution
- Step 1: Write the proportion equation
145,885.79 : 201,322.37 = 78,817.79 : x - Step 2: Convert to fraction form
145,885.79/201,322.37 = 78,817.79/x - Step 3: Cross multiply
145,885.79x = 201,322.37 × 78,817.79 - Step 4: Simplify right side
145,885.79x = 15,867,784,981.31 - Step 5: Solve for x
x = 15,867,784,981.31/145,885.79 - Step 6: Final answer
x = 108,768.54
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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.