Finding the Fourth Proportional to 120,154.19, 165,811.05 and 66,438.02
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Solution
The fourth proportional to 120,154.19, 165,811.05 and 66,438.02 is: 91,683.52
Step by Step Solution
- Step 1: Write the proportion equation
120,154.19 : 165,811.05 = 66,438.02 : x - Step 2: Convert to fraction form
120,154.19/165,811.05 = 66,438.02/x - Step 3: Cross multiply
120,154.19x = 165,811.05 × 66,438.02 - Step 4: Simplify right side
120,154.19x = 11,016,158,270.65 - Step 5: Solve for x
x = 11,016,158,270.65/120,154.19 - Step 6: Final answer
x = 91,683.52
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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.