Finding the Fourth Proportional to 117.78, 162.12 and 90.08
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Solution
The fourth proportional to 117.78, 162.12 and 90.08 is: 123.99
Step by Step Solution
- Step 1: Write the proportion equation
117.78 : 162.12 = 90.08 : x - Step 2: Convert to fraction form
117.78/162.12 = 90.08/x - Step 3: Cross multiply
117.78x = 162.12 × 90.08 - Step 4: Simplify right side
117.78x = 14,603.77 - Step 5: Solve for x
x = 14,603.77/117.78 - Step 6: Final answer
x = 123.99
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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.