Finding the Fourth Proportional to 78,412.08, 108,134.88 and 60,478.68
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Solution
The fourth proportional to 78,412.08, 108,134.88 and 60,478.68 is: 83,403.66
Step by Step Solution
- Step 1: Write the proportion equation
78,412.08 : 108,134.88 = 60,478.68 : x - Step 2: Convert to fraction form
78,412.08/108,134.88 = 60,478.68/x - Step 3: Cross multiply
78,412.08x = 108,134.88 × 60,478.68 - Step 4: Simplify right side
78,412.08x = 6,539,854,804.36 - Step 5: Solve for x
x = 6,539,854,804.36/78,412.08 - Step 6: Final answer
x = 83,403.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.