Finding the Fourth Proportional to 101.42, 139.94 and 91.02
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Solution
The fourth proportional to 101.42, 139.94 and 91.02 is: 125.59
Step by Step Solution
- Step 1: Write the proportion equation
101.42 : 139.94 = 91.02 : x - Step 2: Convert to fraction form
101.42/139.94 = 91.02/x - Step 3: Cross multiply
101.42x = 139.94 × 91.02 - Step 4: Simplify right side
101.42x = 12,737.34 - Step 5: Solve for x
x = 12,737.34/101.42 - Step 6: Final answer
x = 125.59
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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.