Finding the Fourth Proportional to 156,408.70, 215,927.75 and 122,344.80
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Solution
The fourth proportional to 156,408.70, 215,927.75 and 122,344.80 is: 168,901.34
Step by Step Solution
- Step 1: Write the proportion equation
156,408.70 : 215,927.75 = 122,344.80 : x - Step 2: Convert to fraction form
156,408.70/215,927.75 = 122,344.80/x - Step 3: Cross multiply
156,408.70x = 215,927.75 × 122,344.80 - Step 4: Simplify right side
156,408.70x = 26,417,638,362.13 - Step 5: Solve for x
x = 26,417,638,362.13/156,408.70 - Step 6: Final answer
x = 168,901.34
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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.