Finding the Fourth Proportional to 86,939.19, 130,393.36 and 39,543.21
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Solution
The fourth proportional to 86,939.19, 130,393.36 and 39,543.21 is: 59,307.80
Step by Step Solution
- Step 1: Write the proportion equation
86,939.19 : 130,393.36 = 39,543.21 : x - Step 2: Convert to fraction form
86,939.19/130,393.36 = 39,543.21/x - Step 3: Cross multiply
86,939.19x = 130,393.36 × 39,543.21 - Step 4: Simplify right side
86,939.19x = 5,156,172,017.09 - Step 5: Solve for x
x = 5,156,172,017.09/86,939.19 - Step 6: Final answer
x = 59,307.80
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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.