Finding the Fourth Proportional to 86,726.15, 129,995.91 and 56,729.09
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Solution
The fourth proportional to 86,726.15, 129,995.91 and 56,729.09 is: 85,032.60
Step by Step Solution
- Step 1: Write the proportion equation
86,726.15 : 129,995.91 = 56,729.09 : x - Step 2: Convert to fraction form
86,726.15/129,995.91 = 56,729.09/x - Step 3: Cross multiply
86,726.15x = 129,995.91 × 56,729.09 - Step 4: Simplify right side
86,726.15x = 7,374,549,678.02 - Step 5: Solve for x
x = 7,374,549,678.02/86,726.15 - Step 6: Final answer
x = 85,032.60
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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.