Finding the Fourth Proportional to 135,865.24, 187,429.08 and 81,391.12
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Solution
The fourth proportional to 135,865.24, 187,429.08 and 81,391.12 is: 112,280.84
Step by Step Solution
- Step 1: Write the proportion equation
135,865.24 : 187,429.08 = 81,391.12 : x - Step 2: Convert to fraction form
135,865.24/187,429.08 = 81,391.12/x - Step 3: Cross multiply
135,865.24x = 187,429.08 × 81,391.12 - Step 4: Simplify right side
135,865.24x = 15,255,062,741.77 - Step 5: Solve for x
x = 15,255,062,741.77/135,865.24 - Step 6: Final answer
x = 112,280.84
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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.