Finding the Fourth Proportional to 138,058.02, 207,477.05 and 81,908.62
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Solution
The fourth proportional to 138,058.02, 207,477.05 and 81,908.62 is: 123,094.32
Step by Step Solution
- Step 1: Write the proportion equation
138,058.02 : 207,477.05 = 81,908.62 : x - Step 2: Convert to fraction form
138,058.02/207,477.05 = 81,908.62/x - Step 3: Cross multiply
138,058.02x = 207,477.05 × 81,908.62 - Step 4: Simplify right side
138,058.02x = 16,994,157,918.94 - Step 5: Solve for x
x = 16,994,157,918.94/138,058.02 - Step 6: Final answer
x = 123,094.32
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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.