Finding the Fourth Proportional to 70,805.10, 106,207.65 and 39,312.30
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Solution
The fourth proportional to 70,805.10, 106,207.65 and 39,312.30 is: 58,968.45
Step by Step Solution
- Step 1: Write the proportion equation
70,805.10 : 106,207.65 = 39,312.30 : x - Step 2: Convert to fraction form
70,805.10/106,207.65 = 39,312.30/x - Step 3: Cross multiply
70,805.10x = 106,207.65 × 39,312.30 - Step 4: Simplify right side
70,805.10x = 4,175,266,999.10 - Step 5: Solve for x
x = 4,175,266,999.10/70,805.10 - Step 6: Final answer
x = 58,968.45
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Double scale
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Similar ratio
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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.