Finding the Fourth Proportional to 138,621.99, 191,298.36 and 74,959.79
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Solution
The fourth proportional to 138,621.99, 191,298.36 and 74,959.79 is: 103,444.51
Step by Step Solution
- Step 1: Write the proportion equation
138,621.99 : 191,298.36 = 74,959.79 : x - Step 2: Convert to fraction form
138,621.99/191,298.36 = 74,959.79/x - Step 3: Cross multiply
138,621.99x = 191,298.36 × 74,959.79 - Step 4: Simplify right side
138,621.99x = 14,339,683,936.45 - Step 5: Solve for x
x = 14,339,683,936.45/138,621.99 - Step 6: Final answer
x = 103,444.51
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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.