Finding the Fourth Proportional to 156.99, 235.32 and 138.99
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Solution
The fourth proportional to 156.99, 235.32 and 138.99 is: 208.34
Step by Step Solution
- Step 1: Write the proportion equation
156.99 : 235.32 = 138.99 : x - Step 2: Convert to fraction form
156.99/235.32 = 138.99/x - Step 3: Cross multiply
156.99x = 235.32 × 138.99 - Step 4: Simplify right side
156.99x = 32,707.13 - Step 5: Solve for x
x = 32,707.13/156.99 - Step 6: Final answer
x = 208.34
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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.