Finding the Fourth Proportional to 156.27, 215.56 and 100.99
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Solution
The fourth proportional to 156.27, 215.56 and 100.99 is: 139.31
Step by Step Solution
- Step 1: Write the proportion equation
156.27 : 215.56 = 100.99 : x - Step 2: Convert to fraction form
156.27/215.56 = 100.99/x - Step 3: Cross multiply
156.27x = 215.56 × 100.99 - Step 4: Simplify right side
156.27x = 21,769.40 - Step 5: Solve for x
x = 21,769.40/156.27 - Step 6: Final answer
x = 139.31
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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.