Finding the Fourth Proportional to 105,372.18, 145,439.28 and 88,349.40
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Solution
The fourth proportional to 105,372.18, 145,439.28 and 88,349.40 is: 121,943.70
Step by Step Solution
- Step 1: Write the proportion equation
105,372.18 : 145,439.28 = 88,349.40 : x - Step 2: Convert to fraction form
105,372.18/145,439.28 = 88,349.40/x - Step 3: Cross multiply
105,372.18x = 145,439.28 × 88,349.40 - Step 4: Simplify right side
105,372.18x = 12,849,473,124.43 - Step 5: Solve for x
x = 12,849,473,124.43/105,372.18 - Step 6: Final answer
x = 121,943.70
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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.