Finding the Fourth Proportional to 140,000.79, 193,201.97 and 76,339.65
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Solution
The fourth proportional to 140,000.79, 193,201.97 and 76,339.65 is: 105,349.19
Step by Step Solution
- Step 1: Write the proportion equation
140,000.79 : 193,201.97 = 76,339.65 : x - Step 2: Convert to fraction form
140,000.79/193,201.97 = 76,339.65/x - Step 3: Cross multiply
140,000.79x = 193,201.97 × 76,339.65 - Step 4: Simplify right side
140,000.79x = 14,748,970,387.41 - Step 5: Solve for x
x = 14,748,970,387.41/140,000.79 - Step 6: Final answer
x = 105,349.19
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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.