Finding the Fourth Proportional to 138,646.12, 191,331.64 and 74,983.91
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Solution
The fourth proportional to 138,646.12, 191,331.64 and 74,983.91 is: 103,477.80
Step by Step Solution
- Step 1: Write the proportion equation
138,646.12 : 191,331.64 = 74,983.91 : x - Step 2: Convert to fraction form
138,646.12/191,331.64 = 74,983.91/x - Step 3: Cross multiply
138,646.12x = 191,331.64 × 74,983.91 - Step 4: Simplify right side
138,646.12x = 14,346,795,119.90 - Step 5: Solve for x
x = 14,346,795,119.90/138,646.12 - Step 6: Final answer
x = 103,477.80
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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.