Finding the Fourth Proportional to 130,439.71, 178,658.08 and 122,779.75
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Solution
The fourth proportional to 130,439.71, 178,658.08 and 122,779.75 is: 168,166.53
Step by Step Solution
- Step 1: Write the proportion equation
130,439.71 : 178,658.08 = 122,779.75 : x - Step 2: Convert to fraction form
130,439.71/178,658.08 = 122,779.75/x - Step 3: Cross multiply
130,439.71x = 178,658.08 × 122,779.75 - Step 4: Simplify right side
130,439.71x = 21,935,593,504.59 - Step 5: Solve for x
x = 21,935,593,504.59/130,439.71 - Step 6: Final answer
x = 168,166.53
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.