Finding the Fourth Proportional to 120,308.79, 180,275.94 and 45,387.99
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Solution
The fourth proportional to 120,308.79, 180,275.94 and 45,387.99 is: 68,011.34
Step by Step Solution
- Step 1: Write the proportion equation
120,308.79 : 180,275.94 = 45,387.99 : x - Step 2: Convert to fraction form
120,308.79/180,275.94 = 45,387.99/x - Step 3: Cross multiply
120,308.79x = 180,275.94 × 45,387.99 - Step 4: Simplify right side
120,308.79x = 8,182,362,561.96 - Step 5: Solve for x
x = 8,182,362,561.96/120,308.79 - Step 6: Final answer
x = 68,011.34
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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.