Finding the Fourth Proportional to 156,743.14, 215,813.88 and 138,327.40
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Solution
The fourth proportional to 156,743.14, 215,813.88 and 138,327.40 is: 190,457.92
Step by Step Solution
- Step 1: Write the proportion equation
156,743.14 : 215,813.88 = 138,327.40 : x - Step 2: Convert to fraction form
156,743.14/215,813.88 = 138,327.40/x - Step 3: Cross multiply
156,743.14x = 215,813.88 × 138,327.40 - Step 4: Simplify right side
156,743.14x = 29,852,972,904.31 - Step 5: Solve for x
x = 29,852,972,904.31/156,743.14 - Step 6: Final answer
x = 190,457.92
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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.