Finding the Fourth Proportional to 86,369.18, 129,261.15 and 53,110.31
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Solution
The fourth proportional to 86,369.18, 129,261.15 and 53,110.31 is: 79,485.52
Step by Step Solution
- Step 1: Write the proportion equation
86,369.18 : 129,261.15 = 53,110.31 : x - Step 2: Convert to fraction form
86,369.18/129,261.15 = 53,110.31/x - Step 3: Cross multiply
86,369.18x = 129,261.15 × 53,110.31 - Step 4: Simplify right side
86,369.18x = 6,865,099,101.15 - Step 5: Solve for x
x = 6,865,099,101.15/86,369.18 - Step 6: Final answer
x = 79,485.52
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.