Finding the Fourth Proportional to 86,437.12, 129,655.80 and 56,986.48
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Solution
The fourth proportional to 86,437.12, 129,655.80 and 56,986.48 is: 85,479.80
Step by Step Solution
- Step 1: Write the proportion equation
86,437.12 : 129,655.80 = 56,986.48 : x - Step 2: Convert to fraction form
86,437.12/129,655.80 = 56,986.48/x - Step 3: Cross multiply
86,437.12x = 129,655.80 × 56,986.48 - Step 4: Simplify right side
86,437.12x = 7,388,627,653.58 - Step 5: Solve for x
x = 7,388,627,653.58/86,437.12 - Step 6: Final answer
x = 85,479.80
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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.