Finding the Fourth Proportional to 156,748.58, 216,312.99 and 85,128.62
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Solution
The fourth proportional to 156,748.58, 216,312.99 and 85,128.62 is: 117,477.47
Step by Step Solution
- Step 1: Write the proportion equation
156,748.58 : 216,312.99 = 85,128.62 : x - Step 2: Convert to fraction form
156,748.58/216,312.99 = 85,128.62/x - Step 3: Cross multiply
156,748.58x = 216,312.99 × 85,128.62 - Step 4: Simplify right side
156,748.58x = 18,414,426,326.77 - Step 5: Solve for x
x = 18,414,426,326.77/156,748.58 - Step 6: Final answer
x = 117,477.47
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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.