Finding the Fourth Proportional to 156.17, 215.50 and 86.23
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Solution
The fourth proportional to 156.17, 215.50 and 86.23 is: 118.99
Step by Step Solution
- Step 1: Write the proportion equation
156.17 : 215.50 = 86.23 : x - Step 2: Convert to fraction form
156.17/215.50 = 86.23/x - Step 3: Cross multiply
156.17x = 215.50 × 86.23 - Step 4: Simplify right side
156.17x = 18,582.57 - Step 5: Solve for x
x = 18,582.57/156.17 - Step 6: Final answer
x = 118.99
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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.