Finding the Fourth Proportional to 86,618.08, 129,673.68 and 78,317.20
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Solution
The fourth proportional to 86,618.08, 129,673.68 and 78,317.20 is: 117,246.65
Step by Step Solution
- Step 1: Write the proportion equation
86,618.08 : 129,673.68 = 78,317.20 : x - Step 2: Convert to fraction form
86,618.08/129,673.68 = 78,317.20/x - Step 3: Cross multiply
86,618.08x = 129,673.68 × 78,317.20 - Step 4: Simplify right side
86,618.08x = 10,155,679,531.30 - Step 5: Solve for x
x = 10,155,679,531.30/86,618.08 - Step 6: Final answer
x = 117,246.65
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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.