Finding the Fourth Proportional to 78,698.13, 118,058.82 and 28,093.23
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Solution
The fourth proportional to 78,698.13, 118,058.82 and 28,093.23 is: 42,143.99
Step by Step Solution
- Step 1: Write the proportion equation
78,698.13 : 118,058.82 = 28,093.23 : x - Step 2: Convert to fraction form
78,698.13/118,058.82 = 28,093.23/x - Step 3: Cross multiply
78,698.13x = 118,058.82 × 28,093.23 - Step 4: Simplify right side
78,698.13x = 3,316,653,478.44 - Step 5: Solve for x
x = 3,316,653,478.44/78,698.13 - Step 6: Final answer
x = 42,143.99
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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.