Finding the Fourth Proportional to 157,739.70, 217,684.08 and 86,122.74
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Solution
The fourth proportional to 157,739.70, 217,684.08 and 86,122.74 is: 118,851.18
Step by Step Solution
- Step 1: Write the proportion equation
157,739.70 : 217,684.08 = 86,122.74 : x - Step 2: Convert to fraction form
157,739.70/217,684.08 = 86,122.74/x - Step 3: Cross multiply
157,739.70x = 217,684.08 × 86,122.74 - Step 4: Simplify right side
157,739.70x = 18,747,549,423.98 - Step 5: Solve for x
x = 18,747,549,423.98/157,739.70 - Step 6: Final answer
x = 118,851.18
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1.5x scale
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.