Finding the Fourth Proportional to 72,038.70, 107,920.35 and 38,747.70
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Solution
The fourth proportional to 72,038.70, 107,920.35 and 38,747.70 is: 58,047.48
Step by Step Solution
- Step 1: Write the proportion equation
72,038.70 : 107,920.35 = 38,747.70 : x - Step 2: Convert to fraction form
72,038.70/107,920.35 = 38,747.70/x - Step 3: Cross multiply
72,038.70x = 107,920.35 × 38,747.70 - Step 4: Simplify right side
72,038.70x = 4,181,665,345.70 - Step 5: Solve for x
x = 4,181,665,345.70/72,038.70 - Step 6: Final answer
x = 58,047.48
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.