Finding the Fourth Proportional to 98,931.34, 136,706.30 and 72,027.15
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Solution
The fourth proportional to 98,931.34, 136,706.30 and 72,027.15 is: 99,529.28
Step by Step Solution
- Step 1: Write the proportion equation
98,931.34 : 136,706.30 = 72,027.15 : x - Step 2: Convert to fraction form
98,931.34/136,706.30 = 72,027.15/x - Step 3: Cross multiply
98,931.34x = 136,706.30 × 72,027.15 - Step 4: Simplify right side
98,931.34x = 9,846,565,176.05 - Step 5: Solve for x
x = 9,846,565,176.05/98,931.34 - Step 6: Final answer
x = 99,529.28
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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.