Finding the Fourth Proportional to 138,905.19, 191,689.17 and 75,242.99
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Solution
The fourth proportional to 138,905.19, 191,689.17 and 75,242.99 is: 103,835.33
Step by Step Solution
- Step 1: Write the proportion equation
138,905.19 : 191,689.17 = 75,242.99 : x - Step 2: Convert to fraction form
138,905.19/191,689.17 = 75,242.99/x - Step 3: Cross multiply
138,905.19x = 191,689.17 × 75,242.99 - Step 4: Simplify right side
138,905.19x = 14,423,266,498.48 - Step 5: Solve for x
x = 14,423,266,498.48/138,905.19 - Step 6: Final answer
x = 103,835.33
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1.5x scale
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.